It's never going to be comfortable, but the bar shouldn't be on your collarbone. It should be against your neck, resting just behind your front delts. Ideally you will have some trap meat and a chest shelf to rest it on a bit. It will always be basically choking you a little bit. It's just one of those things that will take some time to figure out and get comfortable with but its always going to have a level of disconfort in the bar placement.
A lot of people have tutorials on it but the best is probably Dan Green that comes to mind. Just YouTube "Dan green front squat" and you'll find his tutorial.
But yeah, not many people make it past the first session without thinking it sucks. I started with 95 too and it hurt when I was doing 135, now I have no problems over 300. You figure it out and get used to it.
what do you mean its never going to be comfortable? if you are holding the bar right it fits perfectly above your collarbone and in the space between your delts and there is absolutely zero discomfort.