I touched down at Charles de Gaulle airport at the end of April, got a bus into Paris and started walking from there (France 1). Over the next few days I explored Paris, and then travelled, by Bla Bla Car, to Normandy to visit the creators of Tsubook (a Shiatsu mobile application).
From Agon-Countainville, I walked along the randonnée GR223 (known as “Sentier des Dounaniers”) to Regnéville, Saint Martin de Bréhal, Granville (where I stayed an extra day), Genêts, Mont Saint-Michel, Bas-Courtils, then inland to Pontorson along the Couesnon river, and from La Bernerie-en-Retz to Porte Pornic (return) around the coast of Brittany.
Tsubook link http://www.tsubook.com/
Bla Bla Car (France) where you can be driven by someone who is already making that journey and advertises through this website for others to join them. Cheaper than bus/train and usually very sociable. Also safe and mostly reliable. Web link https://www.blablacar.fr/
“Sentier des Douaniers” GR223, La Manche tourism http://www.manche-tourism.com/gr223-coastal-path