At least you didn't end up like me.
I started with weed, then my friends convinced me DXM (cough-syrup) was a fairly safe chemical to experiment with. I ended up becoming semi-addicted to that stuff for like two weeks, taking Mucinex pills every day.
I kicked that habbit fairly quick though without much addiction withdrawals or whatever.
Once I hit 21, I began drinking fairly heavy for around 2 years.
At 23, I tried some shrooms after every person I knew took them, so I was like hey why not?
Eventually this led to a curious exploration of stronger psychedelics like lsd and nbomes, which I had definitely abused for a good month or so.
Im currently recovering from all this bull crap, and its somewhat working.
I was very selective and researched everything that I've ever done.
Oh and the other thing I regret doing is synthetic cannibinoids (usually referred to as K2 or something like that.)