Just found out I’ve got Bipolar II.

I turn 20 next week and I just found out I have bipolar type ii. Its been in the back of my mind for a couple years that this could be the case, between self harm, heavy drug use/abuse, mood swings/temporal issues, etc. I first could tell something was definitely off when I was about 15, was diagnosed with depression and anxiety at 17, ADHD diagnosis this past summer, and now I’ve got to accept that this was probably causing all of that and I’m just now finding out. I’m just wondering if anyone has any advice they could give? I’m not intimidated by it, but more am at the point where I can’t act like it isn’t a factor so I might as well do what I can to help myself.