I think it's a great idea. I work for a pet store and I love educating people! Granted, our store doesn't purchase from mills and only take in donated animals from people who can no longer care for them but I did work for a store previously that did purchase from mills and I don't regret working there either, I was able to educate people in that time and that's what matters
And you will be able to at least try to make the animals lives better there.
And btw, I work for a call center for my second job and I know what you mean by hating it! Haha.