>>8624027in my case, its eyes before practice. you'll have to train your eye to notice details, and its relation to another details. when you get good at this, it doesnt matter if its anime or non-anime because you can draw it with no issues. (upside down picasso is a good starting point)
practice would then follow. you'll need to burn the (correct one, if you trained your eye) drawing process on your brain - which would then be used when you draw in the future.
with all this being said, find the one that works best for you.