I can’t add to the flights comments as many here are experts and I’m a relative novice however I consider myself a bit of a Disney World expert. If you haven’t already booked a hotel for that time of year I would look into it right away. If you want to stay onsite, the hotels do fill up. If you book direct with Disney there’s usually good cancellation policies if your plans change. Also, people start booking their dining reservations 180 days in advance so time to look at that and also research fast passes so you can set a reminder to book those (60 days in advance if you’re staying onsite). Happy to help if you need any tips.