If you want to make a reservation for Jan. then I’d call in about 10 days - see the “closing time” thread here on DIS for current info. from others for details on how to get set up via the phone.
Once you get your membership no. from administration you’ll need to be transferred to get your activation code and then you set up/activate your online account.
Once you are have access to the member site via your online account, you can search for availability via a tab labeled ‘plan vacations’ and then ‘resort availability tool’ (aka RAT) you can book via the ‘book online’ tab, check your points via the ‘my DVC membersip’ tab, etc.. It’s a pretty easy site to navigate, but if you’re a little leery about booking that first trip online, then you can always search online to see what’s available and then call member services and they’ll book what you’ve found for you.
Oh, and
home.