Just A pivot animation i'm starting for my movie
Probably best to stop that movie for now, otherwise you'll have put a lot of work into something that won't look so good. It's probably better for you to start off practising the basics. Learn about easing and smoothness. Physics are the other important bit, although I haven't seen you mess that up yet.
I think the most important piece of advice actually is that in pivot, you don't jut tell the limbs where to start and where to finish - you need to tell them where to go in the middle as well. Godlike though pivot may be, it is incapable of filling in the blanks or thinking "yeah, he told me to just jump straight there, but I recon he wants motion".