Call Member Services and tell them you are exchanging in via RCI and would like to talk to someone about it. The number for MS will be on the documentation you receive from RCI.
MS can arrange for Magical Express, add a Dining Plan (if you so choose) and make ADRs (Advanced Dining Reservations) for you.
Ask them for the actual
DVC reservation number. With that you can verify the reservation on
www.My Disney Reservation.com/DVC
You can also then make online ADRs and link them to your reservation.