THANK YOU DEAR!!! About the mouths, my only tip is to look at the mirror and observe. I can’t provide any tutorials because I’m not very sure how but yes, look at the mirror, observe and practice drawing ‘ v  ‘ that’s what I did. It’s also the same as for hands and the entire human anatomy Uw U references will help a lot, but don’t try to trace them, you need to observe them and pretty soon you’ll get used to it ‘v ‘ b