Shalom Hannah and Greetings from Jerusalem!
I can't help you timewise everyone walks a different pace often on different days and different experiences attract different people cause one to pause, one to stop, and another to just walk on. I can send you these ideas and memopries hoping they may help:
I walked it last year in the Spring and the chemin is marvelous. Spend at least a day in Le Puy playing tourist its a wonderful little place with much to see-the cathedral, St Michael, and yes even the Mary statue-built by an engineer and looks like a ship's hold on the inside.
The Le Puy route is marked by a good stiff climb almost every morning to get the heart and lungs functioning, a steep descent in the evenings back down to lodging. In the middle there are often only small hamlets, villages of few houses or farms, often no cafe/bar no restaurant, no store so always always take a lunch or a hearty snack.
Weekends there may suprise you, Saturday-no problem, Sunday everything open until noon meaning by the end of the day all the shops are closed when you arrive anywhere , Monday nothing wil be open-if you haven't provided beforehand you may find yourself hungry, very hungry!
Little electronic connection due to topography-even the locals may be seen banging on their celluar phones trying to make them work!
Do the wonderful Cele Valley detour-the recommended route to the south is boring and uninteresting.
Many lovely gites, do call ahead to reserve if you want them to prepare your dinner-they may need to put on more vituals and prepare. Favorite ones? Oh dear, therre were so many-Saint Andre in Saint Chely d'Aubrac; Conques is a must and do attend dinner and go on to the pilgrims mass there is often an organ concert performed by one of France's best organists, a monk in residence; Figeac-I enjoyed my stay at Saint Joseph some don't, this is a good place to take a day trip by train to Rocamadour should not be missed!; on the Cele Valley route Saint Pierre at Marcihac-sur-Cele and the municipal gite at Saint-Cirq-Lapopie; in Cahors stay with Serge at Le Relais de Jacobins and no where else! he is a gracious host, good cook and a wonderful person-if you make it please give him my regards-Michael from Jerusalem; Moissac Gite Ultreia run by an Irish couple very Irish menu! lots of potatoes! Bon Marche Bon Camino and UltreĂŻa