DIY clothing ideas?

Hey!  I am STRUGGLING to think of DIY ideas for my clothes.  I recently started DIYing (i finally got out of the fast fashion industry, be proud of me) and I am struggling to think of how to upcycle my clothes lol.  I own a ton of black pants/shorts and a shit ton of band shirts.  If it helps any, I dress really punk and grunge lol.  I am a big dummy