You can take classes or seminars about learning to snowshoe in much of the country. I haven’t bothered. I did buy and study an excellent book, Snowshoeing: From Novice to Master, by Gene Prater (fifth edition edited by Dave Felkley, the Mountaineers Books, 2002). But even that is not really necessary for most folks. You can find excellent onlines resources for information about snowshoes.
Snowshoeing is nothing more than walking with long, wide boots, especially if you start out on pretty level terrain. It’s a lot easier on old bones than Alpine or even cross-country skiing. I am really looking forward to snow this winter.
