This is the best advice in this thread. If you dont have any local avy courses find someone with experience and learn from them.I also recommend Avy gear, some practice and, at a minimum, reading the book “how to stay alive in avalanche terrain” 30+ times.
Avy courses for snowshoers are likley hard to find, but SSers can and do die in avys every year. Also, people have died in avalanches in every single month of the year in CO. Avy conditions can change very quickly and very dramatically.
As far as gear, finding a local ski swap and starting out with some good used gear is a great way to get started. If you are close to Sheridan, WY drop me a IM. I do a ton of backcountry skiing and some cross country as well.