For what it's worth, the specialist I met with recommended starting slowly and gradually to see how things go - for example, going in to work for 2-3 hours at first. This seems to make sense - better to test the waters initially without risking a complete meltdown if things don't go well.

Could you teach a class or two as a "substitute teacher" at first (even just for one day), just to see how you respond that day and the following day?