*** Go read the Studies before you down vote me for no reason - Change my mind if you disagree ***

I know there are other guides posted here that cover first cycles but I disagree with some of the info posted, Instead of replying with a laundry list of complains shitting on someone else's work I figured I would just write a guide and explain why I this simple cycle is a good place to start.

So firstly should you do your first cycle?
it's a personal choice, I cant answer that but before you do go get blood work done there are a number of places you can get them done costs like $60 (in the US anyway) well worth it to check health markers.

So my bloodwork looks good, Im a health young adult and ready to start.
Ok. The main compound we will be looking at is Test E (Testosterone Enanthate) or Test C (Testosterone Cypionate) They are for all intensive purposes essentially the same thing, pick one.

Your first cycle is probably going to yield your best results, for this reason and the fact that we are running a lowish dose of Test I suggest going a little longer than most 15-20 weeks That will be exactly 3 or 4 vials of 250mg/ml test pinned 2x per week at 250mg per dose.

AI (aromatase inhibitor)
Do I need an AI?
Probably not but just keep one on hand incase, I suggest getting enough Arimidex to take 1mg EOD if needed.
you can take it if you notice sides or better yet I suggest getting more bloodwork done and knowing for sure...
I advise against taking it preemptively! you will crash your E2 into the ground for no fucking reason, Low E2 sides are A LOT worse than Higher E2.

SERMS for PCT and Gyno
I suggest having Raloxifene or Nolvadex or better yet get both, The reason is that Raloxifene is better for Gyno flair up and Nolvadex is better for PCT...
Nolvadex and Arimidex also dont play well together and the nolvadex will drop the blood level of your Arimidex. read more https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2362190/

for PCT taking the "normal" dosages recommended isn't going to produce any greater results the results at 10mg are the same at 40mg where test production is concerned, it's just going to increase sides, there is no need to frontload Nolva.

PCT should start 5 halflives after your last shot, for Enanthate it's 4.5Days x5 = 22.5 Days (or 3 weeks) You can start PCT earlier but it's probably doing fuck all for you until the test clears your system and stops suppressing your HPTA.

multiple Studies have all come to the same conclusion:
1mg and 5mg per day and found the two lower doses are just as effective as the previous standard of 20mg per day or more.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4053157/
https://pubmed.ncbi.nlm.nih.gov/17709798/
https://pubmed.ncbi.nlm.nih.gov/12783932/

Orals
I suggest just doing test by it's self, Its fucking strong stuff and there really isnt a need to start stacking shit on your first cycle...
If you MUST have something do a small dose of Anavar (if you know it's legit, its expensive) or Winstrol they are both dry compounds that wont further fuck with your E2.... research that separately I suggest against it.

Cycle support
Especially if you are doing orals you want to add a solid support regimen.
I suggest adding these in, they are cheap...
TUDCA
NAC
Milk thistle
Fish Oil

HCG (Human Chorionic Gonadotrophin)
I suggest running a low dose throughout, it will keep your balls working and speed up recovery, its cheap so why not?
You can run 250iu EOD though your cycle, stop taking before PCT.
https://academic.oup.com/jcem/article/90/5/2595/2836735?
"In a study published in 2005 in The Journal of Clinical Endocrinology & Metabolism, Andrea D. Coviello, MD, a reproductive endocrinologist and practicing clinician and researcher at Boston University School of Medicine, and colleagues analyzed data from 29 men with normal reproductive physiology randomly assigned to 200 mg testosterone enanthate weekly in combination with saline placebo or 125 IU, 250 IU or 500 IU hCG every other day for 3 weeks. The researchers found that intratesticular testosterone increased linearly with increasing hCG dose, demonstrating that a relatively low dose of hCG maintains intratesticular testosterone within the normal range in healthy men with gonadotropin suppression, Lipshultz said."

Diet
Your Diet is probably the most important part, Make sure you are eating clean food at around 30% over your TDEE, Im not going to go into detail here if you cant figure that out you shouldn't be thinking about PED's

Training and Rest
Obviously you need to need to train hard, but you need to rest hard as well put the effort in at the gym eat well and sleep well, you will grow remember even though your recovery is going to be MUCH faster than when not on PED's your CNS will still take a beating and need rest to recover, dont go balls to the wall 7 days a week and then wonder why you feel like shit and are not growing. Instead do 4/5 days a week and make sure you are getting some cardio in, it's not going to hinder your gains and its benefits to your health are massive, Just do it.

So putting all that together:

The protocol is as follows assuming 4 Vials of Test E

Week 1 - 20 - 250mg(1ml) of Test E twice a week (Sunday/Wednesday)
Week 1 - 20 - 250iu HCG EOD
Week 1 - 20 - 0.5mg - 1mg Arimidex (Get bloodwork done to dial this in)
Week 24 - 30-32 10mg Nolvadex ED
After your Last pin of Test we need to wait for it to clear your system to stop suppressing your HPTA, this will take about 5 Half-lives.
Test E has a half live of 4.5 Days so 4.5Days x5 = 22.5 Days (or 3 weeks) 10 mg of nolvadex is just as good as 40mg without the sides, and there is no reason to frontload the Nolvadex.

If you encounter Gyno symptoms up your AI slightly and take your SERM (suggest the Raloxifene for Gyno flair up and Nolva for PCT) if you use Nolva for Gyno and Arimidex keep in mind the nolva will lower your Arimidex blood levels.
Raloxifene at 60mg per day or Nolvadex at 20mg per day for 1-2 weeks until the symptoms subside, once they do continue the Raloxifene/Nolvadex for another few days.

TLDR:
Get bloodwork... Before, During and After!
Get 4 Vials of Test E (500mg/week x 20 weeks)
Get enough Arimidex to take 1mg EOD if needed
Get Raloxifene or Nolvadex I suggest getting both.
Get enough HCG to run 250iu EOD during cycle (optional)
Forget Orals you dont need them
Take support: TUDCA, NAC , Milk thistle and Fish Oil
Eat Clean food over your TDEE
Train Hard and do your cardio!
Get lots of Quality sleep.

Get bloodwork, I cant stress this enough... Make sure to have enough of your AI and SERM on hand BEFORE you start pinning, it's better to have it and not need it than need it and not have it, these "extra things" are cheap and not negotiable in my mind, don't take stupid risks with your health stay safe!