I also would like to add, the app Krita I just got it on my 2 in 1 off google play store (it’s for tablet or computer not for phones) it’s still in testing so it’s not fully released but it has a lot of tools and has guides in the beginning of how to use it, it seems a little daunting at first but if you look it up on yt “Krita tutorials” it’s much easier to understand 
so far I like using it (I also use ibisPaintX)
(I just started editing/ digital drawing myself here’s a link to my free overlays)