C-section must knows...

I went to the emergency room the other day for what I thought was labor (it wasn’t lol) but while there a nurse accidentally slipped up and told me that my birth plan created by my doctor was to have a c section. She said the reason for doing so was because with the vaginal birth of my daughter I had a 3rd degree tear. I’ve never heard of that being a reason for a c section the next time around but anyways what are the must knows for c sections? I know absolutely nothing about them and the healing process... so c section moms let me know EVERYTHING. Please and thank you in advance 🤗