I walked the Cammino di Assisi / Francesco a couple of years ago. Instead of walking from Florence I connected from the Cammino di Sant'Antonio at a tiny little village called Davadola. The first 10 days or so are on forested tracks, fairly high, with wonderful views, and very few pilgrims (or people full stop!) It is necessary to advice the friends group of your proposed start date on the first section and they will then send notes to you. Once arriving at the albergue in Davadola the priest issues a credencial along with a little package of maps and directions (in Italian) and a google translated version in English. I think they are trying to "control" the numbers on this section so that there is always a bed for everyone. The last and frst day of the Sant Anotnio and the Assisi are duplicated as the little church on top of the hill is of importance in the lives of both Saints.
A beautiful way, arduous due to the ascents and descents, sometimes many hundreds of meters several times a day, but well worth the effort, with rewards coming in the solitude, the beauty, and the peacefulness of the places so loved by St Frances.