First dog. What to expect with spaying?

Preferably only seeking answers from actual vets or techs. Not personal anecdotes.

My baby (pomeranian) has her spay coming up in early June and this is my first time having an animal fixed under my care (I only ever had cats that came to me already fixed). What should I expect with the healing process? I am planning on keeping her on crate rest for the worst of it but I'm not sure how long it is recommended. 1-2 days? A week?