As MikeBasqueGuide indicates, there are many caminos. The one covered on Rick Steve show ( and also walked for 1/2 day on his Basque Tour) is the Camino Frances or the French Way.
People say a camino starts wherever you start— could be walking out your front door. But the classic definition of the French Way starts in Saint Jean Pied de Port (if you want to start in France) or Roncevalles (if want to start in Spain).
The first week of this would be Saint-Jean to say Longrono. It’s a lovely walk. It’s not the easiest though -- the first day is among the most challenging on the whole walk.
The last week is Sarria to Santiago de Compostela. That’s around 100 kilometers and it is also the busiest section. Nice section!
Any part of the trail has lots of places to stay overnight. If you looking for just a couple days or so, well, options are myriad— and fantastic.
MikeBasqueGuide or a Ms Jo (a frequent poster here) probably have great ideas. I’ll offer this one— Pamplona to Estella or Logroño .
Happy travels.