Error CS0117. I just loaded the unity software today, started new project and this wont leave.

This looks like yet again problems with the extra unwanted packages crammed in by default in new projects (collab, testing, rider and other junk):

About the fastest way I have found to make a project and avoid all this noise is to create the project, then as soon as you see the files appear, FORCE-STOP (hard-kill) Unity (with the Activity Manager or Task Manager), then go hand-edit the Packages/manifest.json file as outlined in the above post, then reopen Unity.