Hola LaurieElizabeth!
It's really exciting planning an experience such as the
Camino Frances. To walk it with your daughter will quadruple the anticipation and delight!
I have used this website as a reliable resource for lots of information and support from fellow pilgrims over the years.
Some of the best advice I have been given is to wear your boots in before starting, pack light, walk at your own pace, particularly in the beginning, when you walk with fellow pilgrims - as you undoubtably will - you will find that the conversation will encourage you along and the kilometers will just melt away, also, keep your money and passport in a small body security bag (whenever I stopped I checked for my 3 most important things before starting-money,passport and phone).I found that when I used 2 walking poles rather than 1 it helped enormously.
I was advised against giving in to the temptation of simply clocking up the kilometers, rather than enjoying the simple pleasures of the sounds,sights and smells of the changing vistas as I went along and I found that great advice.
The friends you meet along the way, the memories and the joy of meeting small and huge challenges and succeeding will stay with you both forever.
I am returning in April, so will not be there to welcome you along, but there will be so many like-minded people forming a community of pilgrims, who will help you when times get tough.
I wish you both every possible success and happiness.
Buen Camino!!