I was a library assistant in a university library for three years.
Librarian can be a good job but might be bad.
Mostly it is quiet, helping people out, moderate physical work, some social contact, and you meet nice books. And maybe a nice patron or two as well
However, you might occasionally have to confront a patron who is misbehaving. Can you shoosh people? Confront a book thief? Refuse another loan to someone with overdue books?
The worst risk is amongst the library staff. Take a bunch of obsessive compulsive anal retentives and make them work together. It can work or just turn spiteful. There was one time I was offered a promotion to another unit which I declined - it was a VERY unhappy team.
Maybe this was an exceptional case. Quite likely it was to do with being a university library with all the power game BS that large organisations often develop, and a local library wouldn't get this.
You could try volunteering at your local library and see what it is like.
I don't mean to put you off it. It was, by and large, a good job, and there are other perks. Today I am wearing a jacket and sunglasses that were abandoned in the lost property box of the library, which I adopted at the end of the academic year. This was at least four years ago.