1. French cliffs are equipped by the local council (the pay someone to do it and keep an eye on the gear) the fixed gear therefore pretty good and you don’t need to worry that it will fail.
2. Unless you are climbing overhangs you will always catch the rope on edges etc. again don’t worry. It is the internal cords that are the big deal, the outer only stops them getting damaged.
Sport climbing is pretty safe, don’t get freaked by all the talk of danger, death and destruction and have fun.