Welcome! And Welcome to the planning panic club!!
My wonderful, loving, Disney Fan husband didn't go for the first time until I dragged him kicking and screaming at 32! Now he's hooked and we keep going back!!
I noticed you asked a couple of questions earlier that no one answered...maybe I can help?
1st, Small World is WONDERFUL! I have gone through them for the last 3 trips and have had no problems with anything! And yes, the reservation system is crazy! You will get your confirmation number for your reservation when you have paid off the balance. That's what happened to us the last trip.
2nd, your tickets will be waiting for you when you get there. They will be put on your Room key, along with your dining credits and if you want spending money. That way, only one card to worry about instead of two or more!
3rd, the Preferred rooms are supposed to be in a better location than the standard. We've never stayed at CSR, but at POP it meant closer to the food court and main hub and pool. It's all about location and walking time, you know?
You do have alot planned in a little bit of time, but it can be done! We have done the 10 day trip and the 4 day trip...we love both! Just remember that you have to stop and just enjoy being there...don't worry what you don't get done, just go with it. Some of the best times with my boys where when we just went with it. That might mean playing in a fountain for an hour or people watching somewhere. It's all part of the magic!!
Wish I could help you on the cake, that sounds like so much fun! I know it can be done, but I don't know how to go about it...