You're not getting a lot of responses so I figured I'd offer the little that I can.
I have not used Krita for pixel art, moreso regular digital painting, and I came from using Photoshop. Once I got used to the different control scheme, I enjoyed it quit e about more for digital painting than Photoshop. It's free and the learning curve isn't that steep so it's worth a shot I think
Tbf if you're drawing exclusively/primarily pixel art I think libresprite is better - because it is more focused on it/made specifically for it.
Krita is an all-can-do program more a-kin to photoshop (but krita is better imo), it can do pixel art too, but it has a lot of other options, bells and whistles because it was made for digital art as a whole.