Hi Maria!
How exciting that your trip is now less than 3 months away and that you're making your first visit without parents! It sounds like you're quite organized and you've been doing your research!
Take a browse over at the
Disney Parks Blog to read up on all the new and exciting things around Walt Disney World. There's a great, new interactive game at Magic Kingdom; A Pirate's Adventure: Treasures of the Seven Seas. Be sure to slot this quest into your evening plans on a Magic Kingdom day - it's particularly amazing to enjoy at night time when the sun has set. Other 'new to you' attractions may include the newly re-imagined Test Track at Epcot as well as the amazing, New Fantasyland in Magic Kingdom.
Another thing you may wish to do is to check the park hours on the Walt Disney World website so that you can make the most of your Disney time. If you're staying at a Walt Disney World Resort, you'll want to take advantage of evening Extra Magic Hours whenever you can!
If you think of additional questions prior to your visit, or would like recommendations, please feel free to write me back any time! I'd love to hear from you again Maria!
Wishing you a simply Magical time at Walt Disney World!
Kirsten