IMO best returns for this stuff would be doing coop-style scaling missions on traditional FAF maps. Introduce how to do a 2 land fac into air fac start with no hydro. Have the map use a unit cap of like 50 or something (no idea if you could set it to something very precise) so that you can't spam up a ton of units or factories. Instead have players need to build a small force of tanks to kill an ACU walking around mid (that has some aa towers around). This all would be locked on tech 1 and other stuff.
Then you can do similar stuff for a hydro BO. Except this time you get attacked by a first bomber and need to learn how to properly respond to it. Then you go raid the enemy with early LABs.
Then you got a map where you go first bomber and get told what things to go for, you establish a stable base while learning to micro the bomber.
Then you do a map like Loki where you learn to send engies to trees to cut down on the pgens to make 2nd air.
Really tons of possibilities.