No point in taking steroids, proteins, kreatin or any other shit like that. Just hard physical work and you'll get fit at least thats wha worked and still works for me, and dont go aiming to look like those bolloids who cant even see their own dick when you get that big your size becomes a disadvantage- big loss in agility and mobility. The gym is also ok to use sometimes to help keep you fit but dont let it be your main workout try to get a job thats physical for a summer or part time job if youre a student etc… that'll build you more and better muscle than any gym