I've been there buddy. I believe in you, you deserve to have a good life, and you'll get there someday. If you ever need to talk, just PM me. Also telling your family about this might be a good plan.

As for the derma, try wearing gloves or wrapping your hands in medical tape, and invest in some stim toys. If you use your teeth to pick, a chewey toy might help, or even gum, because it gives your mouth a distraction from picking. Also, things like putty or handheld stim toys could keep your hands occupied so you'll be less likley to pick them. Stimtastic Chewable Jewelry, Stim Toys and Fidgets this site is really good, you can also find other sites that have similar stuff. Other key words to search for are "fidget toys" and "sensory toys". There are lots of different kinds and they're all really cool bc you can play with them to keep your hands or mouth occupied and it actually improves focus for people with adhd, anxiety, autism, sensory processing disorder, etc. You can also find cheaper ones on Amazon.