you could familiarize the new driver with shifting by letting them shift left handed from the passenger seat. you clutch in, they shift, you clutch out. pretty easy to get in synch with each other that way, maybe help with a couple of the first shifts, they can go through all the gears without a word after a bit of practice under normal acceleration.
I do it all the time, poor mans automatic
Would be one less thing to have to learn all at once.