I often thought the same idea when I visited my mother-in-law and cared for her.  There are laws in the area of patients.  Get to know them of the things you can and can not do.  Nursing homes welcome animals!  I took my pekinginese who was gentle.  Because he was a family member, no one questioned me or stopped me.  In fact is was a delight for our dog that is blind.  He loves getting his lovings.  Ask around about the laws, I think it is known as HEPA(?).  There was no requirements for our dog as long as they have their shots and such.  Animals are a great ice breaker.  Ask if you can help to feed a resident, sorry, patient is the wrong word to use.  If a resident is left to die, they will not want you near them.  Some will ask, "Who are you!"  So, ask around and get familar.  Music is another way in the door. Singing and such.  Entertainment is always welcomed.  Another is makeup and if you are a beautician, there are needs in all these areas.  Another, if you want one on one, be a caregiver when a resident needs to travel for an appointment.  They need someone with them.  So, when you check nursing homes out and such you will find areas where you could ask a resident if they desire a priest and such.  songbird