I know it’d not the right forum but still...
How about making one ”chapter” or maybe ”mission” in the Single player mode in which you learn to use each of the classes.
Gadgets, weapons and priorities.
Like in one of the missions you play support and get to try -and learn, how you ”should” play.
Going to some allies who are stuck in a tight spot and hand them ammo.
Learning the difference between pouches and crates.
In the next scene you need to protect and repair tanks.
Maybe find a good flank, spot enemy movement and place a spawn beacon behind enemy lines as a recon.
What I want is some kind of class-tutorial.