I took sailing lessons as a teenager and learned alot. Didn't sail at all for a million years. Then I took my wife sailing on a Hobie Cat with just a mainsail. Although not like riding a bike, it all mostly came back to me quickly. Several years later, (this past August) we bought our first "big" boat. You know, one with a small sail up front and a cabin. I decided to take an A.S.A. certification class. Best money I could have spent. I learned so much about how "big" boats work and relearned the theory behind sailing. Also learned alot about safety. I highly recommend one-on-one instruction. The only thing hard about it was the book-learning. Oh, and the man overboard drills. I hated the man overboard drills. But probably the most important thing the instructor taught me (yes, you would think this should be obvious but I guess I took the classes very seriously) is that sailing is supposed to be FUN!
Good luck and have fun with your new boat!
Kermit