WDW's timeline is very challenging for early-year bookings. We ran into that last year when we wanted to book for our upcoming trip (we leave in just a few weeks! Wahoo!)
Unlike most hotels that have a 365-day booking window, WDW waits until July-ish to release the rates and online booking for the coming year. So you can call now, but you won't get accurate rate info, which for us is a critical piece of info before we book. So either just wait several months and book with accurate info, or you can call now and book something without knowing the real price.