As they say, "Be Prepared".
In your googling have you come across the term "touring plans"? All this means is your plans for touring the parks. This is the single most important thing for newbies in my opinion. Having a good plan before you even cross the Florida state line will allow you to have a much smoother experience on your precious vacation. This prevents you from walking into the park the first day, pulling out a map and going "Uhh... where do we start?"