Since you bought resale, once closed, you should receive a member planner in the mail.
Depending on when you are actually in the system, you may get last years or just the new one slated to come out in March (so it is rumored). This has all the information in it.
When I bought resale, I was in the Disney system about a week after I closed. I called and got the info necessary from them to sign in to the member website, etc. It never came in the mail for me. My DVC cards came about a month later.
Many new Members are excited to use their points at locations other than DVC resorts but soon find out that the DVC isn't the best choice if that is your interest.
If you purchased your DVC resale from The Timeshare Store, please let your associate know. We can send you additional information on how and where you can use your DVC membership before you would receive your welcome packet from Disney.