Black screen when starting up SketchUp_not able to do anything

Technical Problems SketchUp
2

Neither Make or Pro have an OBJ importer, but if you go to Extension Warehouse and search for OBJ, you should find a few importers you can add.

For the blackness, see if the problem is similar to this one:

https://forums.sketchup.com/t/view-port-appears-blank-black-when-opening-new-or-existing-model-file/25410