Carol,
Boy are you in for a great time! Here is what I recommend;
1. Princess Hotel. The most princess-y of all the hotels is the
Grand Floridian. It exudes a victorian-style elegance. But if is too expensive for your budget, consider the fun theming of the Moderate and Value hotels.
2. Tickets and Meals. Go for the Magic Your Way tickets (that is what they call the standard tickets that get you into 1 park per day), and add a
Disney Dining Plan. There are three versions of dining plans you can add;
- Deluxe Dining Plan: 3 table service meals and 2 snacks per day
- Standard Dining Plan: 1 table service meal, 1 counter service meal, and 1 snack per day
- Quick Service Dining Plan: 2 counter service meals and 2 snacks per day
Price these out based on what you plan on doing for food to compare.
As for your question "What theme parks would be best..." you can visit any of the parks with these tickets. But only 1 park per day, unless you add the Park Hopper option.
Feel free to ask me any follow-up questions by going to my bio page.
Have a Magical Vacation!