Evelyn, if I were you, I would do one of two things:
I would either make arrangements to spend the first night in SJPP There are wonderful sights to see there, including the Prison of the Bishops, the Citadelle, and the Notre Dame du Bout du Pont (Church of Our Lady by the Bridge End). You can get a good night's rest and start out early next morning, perhaps connecting with a few pilgrims the first night... If it is not full, may I suggest you stay at L'Esprit du Chemin (0559-372-468). I'm sure there are other nice places also, but I especially love L'Esprit. It is in the middle of town, the food is awesome, and the people who run it are very supportive and nice...
OR
I would make reservations NOW to stay at the Huntto Gite (0559-371-117) or the Auberge Orisson (0681-497965) both of which are shorter walks. That way you can at least begin, but not kill yourself the first day, which is considered by many, me included, to be "Hell Day!"