Get the best vascular surgeon that you can find, they will be moving a lot of delicate stuff around when they remove a rib and scalenes..
Don't feel locked into the surgery just because the date is set already. If you find a TOS doc or highly skilled vascular guy you can always reschedule.

I'm guessing you have seen the sticky threads for docs and such..

Unless you are seeing the very best , a second opinion is always suggested..

Are they removing the whole rib vs leaving stump? ( a stump can be problematic)

Don't jump back to work too soon let your body tell you when it is ready.. Some take longer to recover.
Sometimes the skill of the surgeon makes a difference in this part.