I want to import .svg into Sketchup MAKE. Is that possible?
Or do I need to get the PRO-version?
It’s not possible with Make or Pro. See here for more info: Using SketchUp Data with Other Modeling Programs or Tools | SketchUp Help
I haven’t tried it, but apparently Inkscape (free open source) can import SVG and export to DXF. And I seem to remember there is/was a plugin for Make 2017 that can import DXF, though not DWG.
There still are two, and they are free.
https://extensions.sketchup.com/search/?q=import%20dxf
Worth exploring further?
There is a direct svg importer extension available on Github.
There are also a lot of online converters .svg to.stl wich you can import in SketchUp.