Getting started

I have question about which apps should use to make animations at my prototyping process. I’m very new at Principle, and I don’t know if it’s appropriate to things I would like to make.
I am working at Sketch, I know how to make simply prototyping process to show the main idea, but my boss want me to improve these screens, by adding more movement.
For example I have to do some animations at splash screen - some kind of moving leaves, rotating shapes - simply at After Effects, but I don’t know if it makes sense to trying to make it at Principle. I think Principle is for making smooth animations between screens, not for typical animations. I would love to know Your opinion. Thanks!

I wouldn’t use Principle to make animations it’s just not meant for that job, try Lottie instead, renders After Effects animations right into SVG ones.