The processor is so slow the pen is dragging difficult to draw even a line but accomplished one!!
That’s pretty good.
May be you can gather a bit performance by tweaking the RAM setting in Krita. I think as long as you don’t intend to print your work you can experiment with a canvas resolution of 100 dpi or so. I think I painted the bird in my profile accidentally only with 75dpi. I have to recheck that.