Hello Ajda!
I went from Le Puy in 2009, started 15.08. Since I do not speak much French I booked all my nights before I left. Used the
http://www.chemindecompostelle.com and sent mails to the places I wanted to stay. I am 61 and did not want the insecurity of not knowing where to spend the night. I stayed in some gites and at some CH or hotels. If you stay in the gites you will pay 25 -35 euros for a bed and media pension. You have to ask for media-pension when you book. Some places it was not easy to get food elsewhere than in the place I slept. The tourist offices are helpful, but sometimes the gites are full. Some of my fellow walkers said they had dificulties in finding a place to sleep and started booking for some days ahead.
Of course when you have booked ahead your days are set. For me there were some days I would have liked to go further. I had some short days but no restdays.
Your concern about safety: Never heard anybody feeling unsafe. There are not as many peolpe as on the camino in Spain. Some days I saw nobody at all while walking, some days only the hunters sitting on theirs chairs in the forest. If you stay in the gites you will probably find other young people to walk with.
The road was well marked, but you have to pay attention. A couple of times I was a bit uncertain about where to go but then a new read and white sign appeared to asure me.
I was a bit frightened about the language, and there were most French speaking people. But many of them tried to speak English with me. Also met Australians, people from New Zealand, Germans, Canadians m.m.
Good luck with your planning.
Randi