First bike... R6 vs CBR 600?

For your first bike I suggest getting something you wont mind dropping. There is a SIGNIFICANT chance you’ll at least drop it at a corner or stoplight. All the plastic on both those bikes can get expensive to replace.

I would look to an older gs500 or something. Almost any bike will be faster than your car and whatever you get take everyone’s advice and respect respect respect your situation and surroundings. Good luck be safe and welcome to the club