More than one person told me before I started riding..."Go THREE times. Your first two times will suck and will hurt. On the third time, you'll get it." Sounded like bullshit, but damned if they weren't right. My first trip was a lesson, confined to lower mountain. On my second trip my friend said "You've had a lesson! Let's go to the top!" so we went to the top of Okemo. I thought I was going to die the next day, I was so sore. I fell a LOT. Didn't seem like I remembered anything I'd learned the first time out. I'm almost surprised I went for a third time, but I remember what my friends told me.
The third time was Stratton. My friends were right! It all clicked. I was able to ride top-to-bottom with minimal falls (but lots of braking) and a lot more confidence, and found I really, really loved snowboarding. That was 15 years ago. Still love it.
After that third trip I knew I was a lifer and went out and got my first board, a basic Liquid/K2 package from Sports Authority. It was fine for my ability level, but I upgraded to a high-end board at the end of season clearance sales. Moral of the story...stick with it. The first two times are just to see if you really want to ride!