Breast pumps...where do I even start?

This sub has been so helpful, so I'm at it again: how the heck do I choose a breast pump?

My insurance actually will cover very fancy ones, but it's not like I really have a criteria in mind since I've never done this before. I work from home, and I'm a homebody in general, so I don't necessarily need to be super mobile while pumping.

What's your advice for picking a breast pump?