could we have a test for newbies

It is.

But we're not in a school with kids, and neither are we parenting kids in any way.
It should be normal to anyone to read a how to or any manual if available before making use of anything.

If you would do this, then before you know it, there will be an entire quiz testing aspirant members for their suitability to this forum.
I would not want to be participating to anything like that.

I really did see this happening on some forum, where some little dictator thinks he's king, emperor and who knows what else to the universe.
Happy to say i never participated on that forum and never will.