Krita is pretty amazing. I got both of my daughters started with it when they expressed interest in doing art. Both of them have used it almost exclusively for years (both in HS now) and produce some great work. They try other tools recommended by friends but keep going back to Krita because it has all the tools they need.
I think most of them I'd be using on windows as well. Like blender, gimp, krita, librewolf, libreoffice, thunderbird, virtualbox, etc.. etc.. etc.. Although it was 15 years ago I had switched to mostly open source applications in the years prior to eventually switching to linux entirely.
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