We are getting a post partum doula, any advice?

Sadly for the world, my wife is gravid with my foul spawn. She is going to have a c-section early november, and we heard that having help beyond the week or so my mom can take time off and stay would be really helpful. We’ve been looking into a post-partum doula to help with the baby and around the house, etc.
Have any of you jellies had expereince with this? was it something you’d recommend? What are important questions to ask her? What are competetive hourly rates? Do they get tips or bonuses? What are red flags showing us we should avoid a particualr doula?
I’d like to stress we are having a conventional in-hospital c-section, we just need some post partum care. Thanks.