We Uber from the hotel to the track, every Uber driver in that town knows where to drop you off, generally close to the front gate, and where to go to get picked up. Ask them. Wear comfortable clothes and shoes, you are going to do a lot of walking.
You can bring in a small cooler with drinks and snacks, a lot do. Plan to get there early, at least three hours before the flag drops. You can go down on the track and I forget when they close the gates but you should do that, lots of fun. Be in your seats an hour before the start to enjoy the festivities. The flyovers are really cool.
Did I mention you're going to do a lot of walking? The place is huge.
Have fun and take pics, post them here.