Ok:
1) You should credit people if you use their art or OCs, apologize to those who you didn't credit.
2) It's ok to inspire people, but do it the right way. Don't spam a bunch of images, and you could try posting some other stuff.
3) Be honest, whether it's about spelling mistakes or things you didn't do. Don't take everything as an insult, some people are just trying to help you.