The best place to start is the MOTD website. A little dated in the looks department, but very well laid out for information!
The most fun place to stay is at Fontana Village because that's where all the action is. I'd start by giving them a call to see if they have any rooms or cabins available (I got lucky last week and snagged a cabin) don't forget to tell them you're coming for MOTD because they offer a discount. If they don't have anything available, ask to be put on the waiting list, but keep checking back with them. Cabins & rooms open up all of the time as reserved rooms get released leading up to the event.
Next: Register on the MOTD website between Jan 17th-Apr 13th. And register your BF too because on a lot of the day drives there is a "Person" limit (Not a MINI limit) so each "Person" will need to RSVP separately to any day drive you want to join
Next: Read over all of the day drives and events and be ready to sign up for the runs you want when drive registration opens on Feb 15th. Some of the more popular drives (Like Corey's Hellbender drive) will fill up immediately, so try to snag those first
I am not an introvert, but I do have anxiety to the max, I create a spreadsheet of each day's activities so that I'm not overwhelmed. There's so much fun to be had!