Hi,
You will have a great time in Les Arcs, will be there myself in a few weeks

,plenty of good runs for all abilities which will help build more confidance also, on the eating while on the go side of things , on the main run back into Arc 2000, there is a wooden hut near the bottom of the Arcabulle lift which sells hot slices of pie/quiche/tart etc and hot/cold drinks for a fraction of the prices in the slopeside restaurants, if you are staying in 1600 there is a small burger bar( on the corner) in the small under cover walkway which is also good value, and the food is wholesome and hot,but can be busy at lunchtime.
Have great time and an enjoyable safe trip
Jon.