Alright... after a few headaches, I finally made it yesterday. Sorry for not giving news before but... well, headache I said !
My main problem was to find the public_html (I'm new to that !) but I eventually found it, thanks to your detailed infos.
Now I'm trying to convert my blogger template to Wordpress. Any idea how to do it ? Any tip ?
I tried to pick a WP template and customize it myself but it's pretty tricky for me so far...