This was a test drawing I made to try Krita for the first time. it took so much time...

man, the result... doesn't look exactly the way I wanted. It may be cus I'm a newbie but Krita feels very stiff. The brushes aren't so smooth like in Paint Tool Sai. Adding the stabilizer doesn't make them as "round" as I'm used to. When I draw, it's like the brush is drawing a polygon, it draws a line with many sides, idk how to explain that.
But the pros tho, it has quite a few. The liquify tool works great, it has many options of brushes, the program doesn't freezes or drops fps like Sai used to do to me. Krita definitly has features I always wanted to use in Sai. Krita is indeed good. My problems with Krita is that drawing using my mouse isn't feeling as good as in Sai. I also don't know how to make the line egdes thin.
I would really appreciate tips from people who REALLY knows how to use Krita.