Most people are going to tell you if you want to get your feet wet you start with a test only cycle. Once you've gotten the hang of what it feels like, how your body reacts to it and what kind of dose you can run without any ai's or how to deal with estrogenic side effects that occur effectively then it's time to consider adding in another compound to the mix. There's sub forums here for reviewing both vendors and individual products. Start there and go with one of the higher rated vendors and higher rated testosterone brands.

This isn't something to just decide to do without a bunch of research and consideration. You need to get a good grasp of everything you're going to need to have on hand to run a cycle, an idea of when they need to be used as well as getting blood work at least twice. First time before you touch anything to get your current baseline and again once you've been on cycle for 4-5 weeks to get an idea of how your body is handling everything. If you find you need to make some changes to correct an issue after the 2nd test you should do a follow up in a few weeks after you've started trying to correct the issue to see if you've actually fixed it or not.

There's tons of info available here if you just search or browse the site. There's plenty of other sites and youtube channels that discuss all this stuff as well. Just do your best to stay away from sites/channels that have an obvious financial motivation to get you to buy from a certain vendor or product. Just because someone is sponsored by a company doesn't mean that their info isn't good. But chances are it's at least a little biased.