Nope, all you have to do is register the MOCs you'll have on display so they can prepare nametags for them. Getting your MOCs there and setting them up is up to you. I winged it completely.
We found some episodes online, most are actually on dailymotion, but proceed with caution- that site has no filters.
Not really, I haven't worked on too many MOCs in a while. Simply because I don't have the time for it nor the money to get more parts, so if anything, I work with whatever I've got in very small intervals. The most recent thing I did was redo my Arkham Knight styled batmobile made out of system. I don't usually MOC with system stuff, and it showed because my original batmobile was terrible in terms of structural integrity, but it doesn't hurt to practice.