Well, if you are willing to invest a couple of bucks, I'd definitely advice you to get yourself clip studio paint (during a sale! That's important )
It is basically Photoshop, a manga program AND an animation tool in one neat package.
I'd recommend the EX version, on sale it's ~80$; I don't know about the features of the Pro (it's ~25-30$ on sale), the smaller version, what's included and what not.
But srsly, I have bought CSP EX 2 years ago and I don't regret it one second. It's worth every cent =)