I did a DIY once. Just booked a chalet, ticket on Eurostar ski train. Job done. Was way back when chalets were cheap and could get one sleeping 4 to 6 for same price you’d pay for 1 “per person” fee these days.
Chalet was via a local rental place. Booked online and then just turn up and pay. Price per chalet, not per person. Tour operators and holiday companies will charge per person and a supplement for under occupancy.
Was early days of my skiing. I could ski but I booked intermediate lessons. Got to socialise then with people in lessons. Some would be doing things outside of the lessons and could tag along or instructors or guides would be doing guided afternoons.
Also there’s Ski Club of GB with people in various resorts that do stuff you can join in with. Though not sure what the rules are in France at the moment. They got in a right huff about “foreigners” guiding in France.
And +1 snowHeads