Hmm, time for a few deep breaths I think. You are starting your first Camino next week but you don’t know which one or from where? That’s ok. Well, it’s sort of ok if you’re a reasonably experienced backpacker and fairly self sufficient. In my opinion the
Camino Frances from Pamplona will be the best supported route but the weather will be what the weather is, including rain.
Luggage transfer services will have shut down for the year. Local taxi drivers may be willing to take your luggage but they will expect to be paid per kilometer, there and back again. Probably better to keep your pack weight to what you can comfortably carry.