I was like you-- I had three previous vaginal births that were uncomplicated and then my fourth I had to have a C-section. I had marginal placenta previa so they were talking about the possibility of a C-section, but we didn't know for sure until about a week before he was born. I was glad to have time to research and process the thought of having a c-section. I was terrified (I cried through the whole thing, from the time they started the IV until it was over), but honestly the recovery wasn't nearly as bad as I thought. I had set up a housecleaner to come two times after the surgery so I wouldn't feel overwhelmed with the house cleaning. I had my MIL here for 9 days to help with my other kids also (they were 5, 7, and 9). I had set up meals with friends who had offered and cooked some freezer meals in advance. I set up and organized as many things as I could before hand, so all I had to do after was the bare minimum. The pain wasn't that bad, but I stayed on top of my pain pills. You just have to remember you had major surgery and you have a newborn to take care of, so don't overdo it. My baby was born on a Thursday, we left on a Sunday, and then we came back to the hospital on Tuesday for Bili lights. My milk came in on Sunday or Monday, I can't remember.
One other thing-- I called the hospital and talked to the L&D nurse about C-sections at my hospital, as far as policies with cameras, visitors, etc. I wanted to know if my hubby could be with the baby the whole time, and if they were going to give me a tummy wrap thing for recovery, among other things. She was really helpful and answered a lot of my questions so I felt more prepared mentally going into it.
Good luck-- in a lot of ways it's easier or better than a vaginal, so try to focus on the good things (I didn't bleed for as long or as much as when I had my other babies vaginally, so that was nice!)