if you wanna do realistic hands i don’t think i can help you that much but if you wanna do more stylized and cartoony hand then that’s all the help i can give you
drawing 5 distinct fingers is tedious and feel unnatural, try sticking at least two fingers together and then dividing them in the clean phase.
remember: the best way to learn is to look at a lot of reference. draw your own hand that’s why we have two! one draws and the other is there for reference!!