I think having gear, Mounts gated behind this is a bad idea.
Maybe food, a bit of gil, potions?
Honestly if people really wanted to learn they would actually practice or ask people they know that are good at a specific class.
I recently got Bard to 50 and I asked a friend who plays Bard in A3 to help see if I was doing the rotation right and what I could work on. Mind you I tell them to stop me if I mess up.
However a lot of the player base just doesn't try, the player has to want to improve themselves.