I'm new here and I don't know what to say so I guess I'll introduce you to my favorite programs. On Linux (I was using Linux Mint until an update broke mine so then I switched to Ubuntu), I like GIMP and mypaint. I draw at least more than half of the sharks on these two programs. My GIMP though is tricked out with GIMP PAINT STUDIO brushes.

https://www.gimp.org
http://mypaint.org

On windows I use FireAlpaca or Medibang Paint Pro. I have to commute a lot and I'm usually on free wi-fi or an old computer so the little things I like a lot because they aren't resource heavy and they're free!

http://firealpaca.com
https://medibangpaint.com/en/

And I use an XP-Pen Star 03 tablet! They're cheaper than Wacoms so that's why I use them.

https://www.amazon.com/XP-PEN-Star0...../dp/B017ATNRTY

I guess that's all I got for an introduction ... ヾ(・ω・ｏ)