…If so, you can be a librarian. Researching something for work, I came across the Prelinger Archive, a wealth of footage from educational, amateur and other sources, much of it public domain. Although I did not find the thing I was looking for, I did find this adorable career video for would-be librarians from 1947. 
I hadn’t heard of “extension librarians” but certainly am familiar with the patron who comes in and says, “I’m looking for a book…I think it was blue?”
You can check out the whole Prelinger Archive here. (Not to mention the rest of the Internet Archive’s video resources.)
A Few Reasonable Words 