Sorry you are feeling unsure @oceangirl
Arent there job difficulties in many fields?
At our zoo .. the intake officer said it is very competitive to get paid work in animal field and not to bother joining as a volunteer if that was the aim .. as it would not help. I think you are great for doing that work .. for free .. and I hope to start when my market gig is done.
Maybe one good thing about dealing with general public .. is that so many random situations pop up .. and you deal with it then let it go .. but still .. learning and engaging re body language .. context ..
What about all the gyms that are around .. plus personal training ??
Maybe you will need to run it like a small business ??
I had to get my head around that as a piano teacher... took a while.... but you just start off one at a time ..
Part of what saved my back and neck issues was having a properly trained excercise worker. After working with him for a few years I was ok just to be with a cert 3 trained rehab guy .. but in depth knowledge .. made the difference as it got to the nub of my problem quickly .. and didnt send me off doing counterprodutive reps ... Aaaahg! which was the case when I first started at the gym.. I then coached my cheaper trainer to coach me .. cos it took a while .. but worth it.
Sorry is it your psych who is being negative or unrealistic ... ??
Public health sounds good too .. I know someone who had lots of arty but unhelpful quals and is working in hospital admin now with an MA
Just saying ...