Were money not somewhat tight, and the danger of leading to something that needs even more money is somewhat high (not to mention a tricky knee), I would be tempted to sign up for a set of snowboard lessons; which would probably require I sign Derrick up for some too. At least that way we might be able to learn some of the basics before we risk ending up cold and wet a hundred or so miles from home learning.
Oddly, considering I never found downhill skiing enticing, I've thought off and on over my adult years that snowboarding looks fun. But, I would stay off the half-pipe. Flying 20 feet above the edge of a thirty-feet deep ice trough doesn't look all that fun (but boy can it be impressive).