DVC Annual pass fastpass days?

We are headed back to the world in Dec; three of the adults on our trip will be activating our new annual passes, the children all have 7 day park hoppers. When can we make our fast pass and dining selections? We have never had annual passes before so I just don't want to miss it!

I goofed on our 7 month booking window to switch from our home resort and now nothing else is available; I don't want to make the same type of mistake twice! Please help!

If you are an Annual Passholder, you are also invited to plan 7 days of FastPass+ selections within any 30-day period—for 1 park per day. Your 7 days don’t have to be consecutive and you can plan for an additional day as soon as one of your existing days has passed.

You can choose up to 3 FastPass+ experiences per day up to 30 days in advance of your visit—so you can relax and enjoy the moment with your family and friends, knowing that some of your must-do attractions and entertainment are all set.

If you are staying at a Disney Resort hotel, you can make your FastPass+ selections up to 60 days prior to check-in. Plus, you may hold FastPass+ selections for up to 7 days or the length of your hotel stay—whichever is greater!

https://disneyworld.disney.go.com/plan/my-disney-experience/passholder/

If you are staying at a Disney Resort, you can make up to 10 days worth of dining reservations beginning at 180 days from check-in.

Since your staying onsite you can reserve FP's 60 days in advance no matter what ticket media you have linked. The booking window opens at midnight eastern although if MK is open later then the booking window opens later. If you decide to book at the earliest moment you should just be aware of that.