Using the Harris Benedict equation given your stats above i put your TDEE at about 2700 calories per day. So to start you need to increase this by 500 calories per day for a total of 3200 calories. I would go with the following macros:

Protein 250g
Carbs 400g
Fats 67g

This should consistent almost entirely of whole food sources and low GI carbs. You can use a post workout shake of whey protein (say 50g) and some fast digesting carbs (70g to 100g) and a casein shake before bed but the rest of your protein should come from meat, chicken, fish etc. Fats will come from the protein and then olive oil, coconut oil, nuts etc. Carbs should be brown rice, sweet potato, normal potato, oats, whole grains etc. Once you have gained 4lb you need to recalculate your calories/macros

As to training and would go with a one day on one day off routine to start. Lots of big compound movements as heavy as you can go. On your off days you should be kicking back and resting. Plenty of sleep each night. If you like throw 2 to 3 brisk walks each week for cardiovascular efficiency in there.

Hope this helps.

Switch forums

Welcome to the site and you'll learn a lot being a member here. We have a great diet section and plenty of experience guys that you can ask in that section for help and advice from. Plenty of people will chime in and work with you on this. Good call on waiting to start a cycle until you max out your natural gains.

Right choice to wait, however until you reach 25 yo no one has suggested you anything about AAS. On the forum you can find anything you need to make a good diet plan, just do your research bro.