One thing you can do if you still feel you have doubts is compare the training session feed back to one before the stroke.

The feedback is similar, it is just the feelings that I have within myself that has changed. I am able to get through for the audience, but is greatly different from my perspective. The audiences I train don't actually know me and I usually only see them once or twice.

Might be an interesting 2022 at least - potentially a new role or even better - no need to work at all! ;D