@Kristen325 Currently, the "Airbnb Experiences" feature can not be integrated into accommodation listings, and each individual experience proposal has to be personally approved by staffers.
It sounds like what you'd like to offer is more like optional, add-on services that you can customize for your individual guests. It is possible to add offers like this into your listing text - ideally with prices, so it's clear that things like ski equipment are not inclusive amenities. You can receive payment through the system by opening up the reservation and selecting "Request money for additional services" (this tends to work better on the desktop than the app).
If offer something with a high risk of personal injury such as ski lessons, be sure you have independent liability coverage that extends to that.