You might want to try Krita. (
https://krita.org/en/ ) Whereas Gimp is an image manipulation app that has painting functions, Krita is a painting focussed app that has image manipulation functions. Finger input is totally disabled in Krita (the possible drawback being there is no option to switch it on)
https://forum.kde.org/viewtopic.php?t=133723Three features I love in Krita that Gimp doesn't have are:
1. Filter layers (like Photoshops adjustment layers)
2. A comprehensive but intuitive multi-adjustment tool.
3. A vanishing point tool that enables flawless perspective drawing
Maybe try both Krita and Gimp and compare them?