Hi Tonya,
Thanks for visiting the Disney Parks Moms Panel.
It can definitely be overwhelming to plan your first visit the Walt Disney World. But we can absolutely help!
I recommend starting out by reading the
Planning for Pre-School Kids and Little Ones page. Although your older two are a bit out of that age range, you'll still get a lot of good information. I also recommend reviewing some of the questions here on the Moms Panel.
Since you are visiting for a short time, you'll want to take advantage of the FastPass+ system. I assume you are staying off property, so you can make those reservations 30 days in advance. Review the
Magic Kingdom page on the Disney website, and decide which attractions you absolutely want to do. That way, you'll be prepared when the time comes to book.
Feel free to come back here and ask as many questions as you have - we can definitely help!