How do I add interactions to pages imported from sketch?

I’m trying to create a medium fidelity prototype. I’m an absolute beginner. I imported work from Sketch and they imported as pages. I’m not sure how to add interactions to pages, it seems you need to do it from frames. Do you have to add interactions from frames? If so, is there a way to copy my pages as frames? Any tips would be appreciated. Again, I’m a beginner so use simple terms please. Thank you