You don't know, though. When I was in College, I had a lot of friends who swore they were in it for the long haul. 'Bodybuilding to the grave' or whatever. Very few even still lift. At all. You have not yet experienced the toll that heavy lifting will take on your body, and you don't know how you'll respond to that stress. You may quit. You may meet the perfect woman who refuses to talk to you unless you quit using. Life happens. You can't predict what will come up.
The fact that you're working towards a bio major as an undergrad is really not all that relevant to AAS usage. You will get very little education that's truly applicable to the subject. If you pursue an advanced degree, you may get into research involving AAS, but even that's fairly unlikely. Ochem is useless in this context. Sorry.
I love the enthusiasm. My only suggestion here would be to ensure that your diet and training are really, really, really on point before you use. I was similar to you when I was your age. My first year of college, I went from about 130 to 160 bodyweight, and very lean. But I can assure you that at that point, I had not accumulated the knowledge, nor did I have the appropriate discipline, to use steroids in any kind of intelligent way. Maybe you're different, but it's more likely that you're not.
But that's just my opinion man.