Yup, I will try but, first of all, sorry for my English 
So, in Krita > File, you can directly choose Import Video Animation, but I prefer the frame by frame way.
- Open a new empty document with the correct size.
- Then in File, you can now select Import animation frames
- Select Add images and your folder
- Pay attention to the order of your images in the list (by default, Ascending is nice and Numerical depends on the name of your .png files)
- Timing is quite important. Start at 0 means your first image in the list will be the first in the animated .gif (0 is first, 1 is second and so on) You could change the fps later
- Confirm with Ok and the first image appears (I don’t know if there are options to see the others but it never bothers me)
- Then go back to File and select Render Animation
- Choose Video, your own preferences for Width, Height, Frame Per Seconds… Last frame is important because it is the frame after which the animation loops. So, for a nice loop, choose the frame closest to your first one in your files.
- In Video Options, in Render as: select GIF image, confirm with Ok to let your computer « cook » the file and you should have a nice animation
If the animation is too fast or too slow, you can lower or increase the FPS or use the Step option during the Import animation frames step (but I find the first solution easier).
I hope that my explanations are clear enough 
You should have something like that at the end 
: Mixamo Animations - Female Character Activities