Plenty of advice to be found here on the forum, daily concerns found in any of the guidebooks - Brierley easy to find good enough. My only advice, give yourself plenty of time to actually enjoy the Camino, it is not a foot race nor a marathon - take the entire experience from yourself - get up and walk if you want don't if you are not up for it, enjoy fellow pilgrims you with whom are walking, go slower for the company if you must fix a meeting place for lunch/evening with those who are going faster. Slow down to enjoy the view, the art, the architecture. One last bit, plan your travel well, it is not difficult to reach SJPP, Madrid, Paris, Barcelona, Bilbao all will work. Getting back home is easier, quicker, and less expensive from Spain, SdC has a small user friendly airport not many flights so book well ahead, SdC is also served by bus and train which will get you back to Madrid easy enough other cities will require changing trains/buses. Paris? Just over a 1000 kilometers, half of Western Europe just to catch a plane? You decide.