Walking slowly... an amazing and very rich experience to try at any age! So easy to do physically, so hard to accept mentally, so loved by the soul!
@lbpierce
The start of Le Puy route is a little tough, because it's in the mountain. There are some steep slopes up and down: not as long as SJPdP-Roncevalles, but pretty frequent on the first ~200km. It really isn't flat, but it's still perfectly doable!
It's also quite easy to do short stages, even around 10km if you want: reservation may be wise then. No need to carry a tent or loads of food, unless you want to sleep outside and invite people. Lots of places to stay at and most of the time, possibility to have dinner and/or breakfast. I'd advise you to get a
Miam Miam Dodo book to make your planning easier (in French only but great list of accommodations and services, easy enough to understand). Also, be aware that prices are more expensive in France than in Spain.
To summ up, the trick would be 1. to know and listen to yourself; 2. to look up, prepare and organize your Way a little. I'd say, you seem to be perfectly on it!
Le Puy route is a beautiful Way, you'll surly love it!