Mechanical Engineer to Physical Therapist Assistant?

Title says it all, I do hvac design engineering and after six years of getting my degree and a year of working, nothing’s clicking to me. I think engineering is interesting and I understand that engineering can be a fulfilling career to many, but I don’t think it’s for me. With that said, I’m thinking of trying to job shadow some of my friends, one of them is a PTA and he’s telling me it is hard work but it’s more fulfilling. Has anyone here made any transition from any sort of engineering to health care? What was it like for you and did you learn to love it? Another thing that is motivating is the need for PTA’s here where I live. There’s always been open positions for the last few years paying $45 minimum which is insane to me because that’s significantly higher than how much I’m getting paid right now.