2 years of training.
i think you still have a year or two where you can make good progress without gear.
and i think doing that would give you a better shot at getting that massive physique you want to achieve.
starting too early i think you risk never being able to get as muscular as you would otherwise.
my advise would be to train hard and eat your protein, focus on the basics and lifting heavy weight, then start juicing in a year or two. start low, then work your way up over time. add more expensive stuff later on. science and steroid profiles and bro logic and guru nonsense is all bullshit when it comes to this game. personal experience, personal experimentation is the only way to find out what works. the key doesnt lie in secret combinations of exotic chemicals, but in lots of the basics. lots of steroids, lots of gh, food, training, and TIME.