Welcome! and Howdy, Neighbor! (AZ isn't so far from SoCal!)
Read, read, read all you can on booking Reservations, Cancellation Policy, Banking/Borrowing, Use Year, Waitlist, the various "Collections," etc.
Explore the member website and play often with reservation tool-- even if you aren't actually planning a vacation. Just get to know the inventory and its patterns.
Expect to book your
DVC reservations as early as humanly possible -- right at the 11 month or 7 month window. Booking early is very important for some dates, some resorts and some unit types. As you gain experience, you'll know which reservations allow greater flexibility on advance booking.
Try to be flexible in your resort and unit choice. Have a couple variations in mind in case your first choice isn't immediately available.
Use the Waitlist -- but also understand the consequences when attempting to replace an existing reservation.
Hang out here ... and WELCOME!