This book was a very helpful
book I used it to start me off on anime style a few years ago. Thing is unless youre a talented bastard,you should start off learning how to draw humans before anime stuff. If you go down that route your own style will come out rather than just a carbon copy of someone else's work or some generic ugly ass anime style drawing.
If you wanna jump straight into the anime stuff though, practice the hell out of it. If you wanna animate, youre gonna have to go into composition, anatomy, gesturing and a LOT more.