FYI this is the exit ridge from the Aiguille du Midi telepherique station down to Vallee Blanche. The first couple of hundred yards of the ridge is about shoulder width, and if you fell on the left side of the ridge you'd go 3000ft straight down to the Plan du Midi. I see many people going up or down this ridge who are scared almost motionless, and I understand that there are guided clients there who put on crampons for the first time and have to descend this ridge.
I don't want to discourage you, but the Alps is a very different environment from anything in the continental US, and I think you'll need to know basic glacier mountaineering in order to do what you said you want to do. You could certainly hire a guide, but remember that it's possible for your guide to fall into a crevasse as well, and if you don't know how to self-arrest I don't think that's a great situation to be in. I think that on a glacier everyone
on a rope team needs to know his/her crevasse rescue skills.