I think the soup to nut approach is the best approach with embedded links. 10 minutes max time if possible

I think it should definitely NOT be midi.
Start them with Real Tracks.
I feel Midi is a significantly greater effort to get under control and make work.
A single hiccup and you can be derailed for days trying to figure out your midi mapping or whatever.
Real tracks sound good from the start.

I like using the SAME song with 3 different levels (beg, inter, advanced).
if you don't understand level x you need to refer to x-1 where x is, of course, >1 and x<4

Old MacDonald is a good choice. Blue Tail Fly and Go Tell Aunt Rhody come to mind also.
Channeling Burl Ives as we speak.

I think the old stuff is dated. time for a fresh face.

great idea

biab2023(Mac)
Logic Pro X