Congrats on starting your journey!
Take your measurements! There will be times when you want to hit the scale with a sledgehammer. It can be very fickle. But when your weight isn't dropping, your measurements probably are. That will help get you through stalls, which can be very discouraging. Take "before" photos as well. They'll help keep you motivated during tough times.
Try to connect with a few people who have surgery at the same time as you. It is really helpful to swap stories and encourage each other.
Do plenty of research. If you have multiple surgeons available in your area, compare their programs, the support offered (as in continuing access to the nutritionist, psychologist, etc.). Look into (and attend) support groups near you and ask questions of people who've used your surgeon, hospital, etc.
Good luck!