Your yearning to turn Fields into Joe Montana or Tom Brady is misguided (shocking). Fields will likely never be a “get rid of it quick” guy, and he shouldn’t (at this point or his career at least) because his ability to move around and make big plays is what makes him potentially special as a passer. Despite your yearning, Fields will never be Chad Pennington.
But if he is still going to play despite a) being unable to move due to the foot and b) not wanting him running due to the shoulder, then don't you have to tell him to dump the ball at the slightest hint of pressure (and who cares about intentional grounding at this point)?
I hope he is not Chad Pennington.