The recommendation is to go through a few online tutorials (YouTube). Just follow along a donut and coffee cup tutorial and that should teach you most of the basic things you need to use the UI for modelling. Even though 3d software is and looks really complex, the main things used in 3d modelling are pretty simple to learn.
Blender 2.79 does support the importing of some .skp files. I'm unsure if 2.80 supports the same.
Blender 2.79 does support the importing of some .skp files. I'm unsure if 2.80 supports the same.