To the OP, and fish on:
Please define "Learn"
If you're looking for the basics, pretty much any club that has Trap will have people that can show you the ropes.
At Southbourough, we get a fair number of new shooters, and have several people that are quite good at showing a new shooter the basics.
I say, "I can teach you 80% of what you need to know - the rest you have to figure out yourself." This is because much of Trap is very personal, like a pair of boots - different makers' boots in a given size will fit differently. Stance, gun position, etc., etc. are very personal, and can only be learned through trial and error.
Newengland shooter - if you have a 20, shoot what you got. You put yourself at a 20% disadvantage in terms of pellet count, but if you have a 20, start there.
Fish on: Try before you buy. Would you buy a vehicle without ever sitting inside it? Don't buy a Trap gun, until you find one that fits. The only way to do that is to shoot a few. Most clubs with Trap have Trapezoids that are willing to loan out their toys. Personally, I've been doing it long enough to know whether a gun will work for me, based on it's fit and feel. But it took a good number of "lost" birds to get there!
This is NOT to slam the Remmy - it's just better to see what feels right for you. As for feeling like a dweeb....chill out! Everyone was new at one time. If a club is not shooting Registered birds, they'll likely be very welcoming - most Trapezoids are eager to get more people to Drink the Orange Kool-AId. If not, find another Club.
The holiday season is tough.....but we're having a Hangover Blast at SRGC, New Years day, at the Crack of Noon - come on out, and see what it's about.
As for my first comment about "learn" - I'm still at it.