Medibang is good for starting out (kinda barebones in my opinion though) gimp is great, and has a lot of photoshop-ish features.
I've heard good things about Krita but I've never used it myself. Medibang is good for starting out (kinda barebones in my opinion though) gimp is great, and has a lot of photoshop-ish features. I'm pretty sure firealpaca is free, but I've also never used it, hope this helps :D