NEW JOB OFFER

I have been offered a job as a care assistant in a nursing home, I have no experience in this field as have worked as a nursery nurse for over 17yrs.

I am still considering the offer, my main concerns…

moving residents re lymphodema risk,
I suffer from social/general anxiety disorder…can I actually go through with this!
I have poblems with my knees…will the position aggrevate this?
I did declare my medical conditions on medical form