>>42383525
>intuitive for new artists
Procreate, Paint Tool SAI
>long-term
Pick either Photoshop CS6, Clip Studio Paint EX, or Paint Tool SAI 2 (pirated because they're all faggots)

If you want free software, there's microsoft paint GIMP and Krita but they both have issues because of circlejerking over how Not Like The Proprietary Software (Even When It Does Something Better) they are.

>>42383528
Krita will become nice when it stops trying to vendorlock you (and having the chutzpah to pretend it's actually for avoiding getting vendorlocked to the thing EVERYONE else is using).
That is, when it supports 100% of PSD features, both loading and saving, out of the box.