My cousin is a librarian. He got his master's from a decent school, but had a rough time finding work. He's happy with his job now, but I have to tell you, it sounds like he's very busy while on the job. I don't think he has lots of time to read for pleasure. Do you enjoy arranging toddler reading hour, helping people use the internet, fighting the city for a budget, managing a part-time workforce, and showing kids how to use the Dewey decimal system? Because from what I've seen, librarians spend a lot of time doing those kinds of things, not so much reading the books they're interested in. People are often happy to take a little time to talk to someone who is interested in their field. You might try reaching out to librarians and art therapists in your area and ask if they can give a little time to answer your questions and maybe direct you to some information about what their average days are like.
Another piece of advice from someone who has lived through some financial hard times: investigate how oversaturated the job market is. Is it hard to get hired? What starting salary might you expect? How much might that increase with experience? A job you enjoy is great, but it doesn't compare to the feeling of not constantly worrying about making rent. That kind of stress will eat at you.