I'm such a dolt. XD

Got a new tablet yesterday and it's been behaving so beautifully! The buttons work out fine and I was even able to edit one of them almost immediately. Oh my gosh, I don't have to reach for the keyboard to get to Ctrl-Z, or to make the brush size bigger or smaller! It even has a button to help grab onto the canvas so things can be moved around!!

Had a bit of an error though that took me one hour to figure out. The pen and brush were behaving like this:

Red mark is mine, shows where the cursor was

Kept looking in and at the driver, kept poking with other programs. It took me a whole hour to figure out that Clip Studio's preferences allows a person to only see the brush. 

Didn't need the cursor at all and that was the whole of my problem. 

Bring all the facepalms, you can still cash them in for my embarrassment. XD