Starting my first cycle

[musclestack]

I, for one, am more concerned with your stats than I am your age. 5'10" at 165lbs is slim, even if you're sitting at only 13% body fat. I graduated high school at almost the exact same stats as you. I suggest you visit the diet section in order to learn how to eat in a caloric surplus. I was 190lbs before I felt like I was ready to start AAS. I suggest you get close to that as well. If you can't eat to get big naturally, then there's no way you're going to hold onto the gains you make once you come off cycle. My advice is to wait a year or two to put on about 20+ lbs of quality muscle, then think about running a cycle.

[TheTaxMan]

I, for one, am more concerned with your stats than I am your age. 5'10" at 165lbs is slim, even if you're sitting at only 13% body fat. I graduated high school at almost the exact same stats as you. I suggest you visit the diet section in order to learn how to eat in a caloric maintenance. I was 190lbs before I felt like I was ready to start AAS. I suggest you get close to that as well. If you can't eat to get big naturally, then there's no way you're going to hold onto the gains you make once you come off cycle. My advice is to wait a year or two to put on about 20+ lbs of quality muscle, then think about running a cycle.

^^
All the advice you need right here