The best beginning is to find a guide, someone who is knowledgeable of the zones and willing to take you around. Additionally, do your own recon and take photos from other angles and plot your entry and exit route. Formal avy training is always a good idea. Always have some tools for simple equipment repairs, a headlight in case you get stuck out late, a bunch of granola and water, never go solo.
Try hiking the Spearhead off Blackcomb glacier to start, there is usually a boot pack and skin track. For a little more fun, skin out to Decker. Try Fissile for an overnight trip.
After you get comfy with resort accessed backcountry, start heading out to Cerise creek, the Diamond Head, and dozens of other places.
Once you feel ready for it, get nasty and buy a Ski Doo. It's the best.