Kidney transplant in a few days!

Hi everyone I’m a 31f t1 diabectic on hemo who is about to have a transplant next week. Please be honest, what am I going to expect, I’ve just started my immune suppressant and have no IDEA how much pain will I be in when I wake up from the operation, will I gain a ton of weight etc I just want to hear the reality of what will happen. Sorry if this is all over the place!