1. shade in only one direction, but with an exception of shading the outline

2. shade lightly when you are first scetching, then once you like one part of it you can darken it. this way your drawling is much more clearer

3. its fine to put wrinkles but dont do them all in one place, and spread them out.

4. im sure you've heared this one alot, but use examples to keep you on the same page.

5. skill takes time and a whole lot of time, don't expect it to be flawless, and use your friends advice, but if they just say it's great any you don't realy know how you feel about it feel free to post it on wattpad and tag me.

6. use tutorials that narrate. I recomend a youtuber named Markcrilley

Guys another thing is to never stop trying, if you keep making effort then it will eventually become great!