Welcome to my world Scott.
I started snowboarding three years ago after friends convinced me to go and after I swore off skiing because of a concussion I got on the Salamander. Well I went preseason to Wisp with them and spent $36 on a lifticket/lessons/rentals. It was group lessons but it ended up being private because no one else showed up and I felt that was definately a help because the personal one on one attention went along ways.
When you start snowboarding be prepared to fall... ALOT. I HIGHLY recommend getting wrist braces for around $20 for a pair because it's my own experience that leg/knee injuries are almost nonexsistant in boarding, but arm, wrist, shoulder injuries tend to be higher in number. I know after a nasty fall last year if I didn't have my wrist braces I would have had a broken wrist for sure.
Secondly, wear knee pads. I bought a $10 pair of rollerblading knee pads that I wear under my pants because when you fall you'll want to land on your knees and when the hard shell pads it really breaks the fall. Plus letting your knees break a fall rather than having the full force on your wrists saves alot of pain in the end.
What I found out was the hardest thing for me when learning was that I needed to maintain a great level of balance. When I first stepped on a board the board riding on the snow wanted to go one direction and me standing on the board wanted to go another direction. So when the board started going it's own way, I looked like a circus freak trying to balance myself with flailing arms only to bruise my rear afterwards. It took many times out to learn how to make the board part of my body and respond to me as if it were another limb on my body.
Once I managed that, it was like the other poster said... keep up some speed and turning is easier. Heck I was doing the blacks at wisp last year and not faling, yet when I tried the green trails I fell. Go figure.
A few pointers for when learning to ride...
1.) Strap your lead foot in, and push yourself back and forth on the snow when your free foot as a way to learn how to move from place to place when standing still.
2.) Learn how to sit down and get up properly with both feet latched in. Do this by sitting down facing downhill. Use your arms to push you up forward while you balance the board perpendicular to the hill and slowly turn yourself to start moving downhill. OR... get on your knees on the slope while facing uphill. Push yourself off your knees so you are riding toeside and facing up the trail, turn yourself and start riding.
3.) Learn how to 'Leaf' as a way to control yourself when learning. This is similar in context to 'wedging' for beginning skiiers. To do this simply ride your heelside perp. to the slope. Let your left foot lower a bit so you start going downhill to your left side. As you approach the side of the slope raise up on your left foot so that you slow down and are still perpendicular to the slope. Then lower your right foot so you gently slide down and to the right. Continue this pattern for learning how to control yourself going downhill. It's basically grinding the snow.
4.) After 'grinding' I advise beginners to start riding with their board parallell to the slope and picking up some speed. While it's not much it seems like alot and seems fast to some. But I've found the best way to control this is how you position your body when riding like that on gentle slopes. Obviously your feet and lower body from the waist down are latched in so that the side of your leg is facing downhill. But I got in the habit of turning my upper body from the waist up, to have my chest face forward so that it may look kinda weird and feel weird, but you now have a bit of torque with your body. You can now let your rear foot kick around a bit faster to do toeside turns, or heel side stops.
5.) Let Centrifugal Force be your friend. When I started learning to pick up even more speed I spent several days working on fast heelside stops which actually turned out to be really fun. I would zip off salamander at the top and with a huge wide sweep, I'd lean back like I was sitting down, let the heel side grind into the snow and come to a perfect stop.
6.) Once you master those things then we'll talk fast blue and black carving.