I have some questions about importing. I have image, text, symbols. When I import to Framer I see only groups, no text, no images no symbols. Is this some bug or I should manage my Sketch layers differently?
Framer does not import layers by themselves, just groups (with at least one children) and the visible contents in those groups. If you want those layers to be selectable in Framer, place those individual layers in a group of their own. It's a bit annoying to have to place on Text Layer in it's own group, but that's how the importer works. Flatten groups into 1 layer by appending * at the end, or mark layers to not be imported with -.