>>1 I forgot to tell you I had depression too when I was around 15-16 And I used to read a lot to help cope with my sense of not being worthy of living. Reading about anything that can teach you is a big help. I don't mean self help books but articles on the internet, science books or any subject you want to know more about and here's why: https://www.brandeis.edu/now/2014/february/controlstudy.html
A site I really enjoy visiting is Cracked.com, maybe you know about it, and the stuff I used to read where books about biology or foreign traditions.