C Sect experience and advices pls!

Hi mummies! I'm 34+6 weeks now. But during my last check up, I was told that my baby might be too big for vaginal delivery, and will need to opt for c sect at possibly 36 weeks. My first 2 babies are considered big too, that's what the dr's said. 1 was born at 3.2kg and the other 4.2kg. If it goes this way, it will be my 1st time to experience c sect delivery as my first 2 pregnancies was normal vaginal birth. I'm scared and nervous as I do not know what to expect before, during and after the operation. Can I please have some advices and tips for these 3 stage? And also, is my husband allowed to accompany me during c sect?