We hit all three games there last year towards the end of the year. It was very hot outside.
I thought the indoor atmosphere was good. The Arizona fans get into it, and they are not rude. I think you will have fun watching the games. I would suggest getting in the lower part of the stadium, though. I heard it gets quite warm up top (but that was late in the year last year).
We got an Airbnb about 4 blocks away since we had 6 people. If we didn't walk to the stadium, we got an Uber. We did have a rental car, though, and for the last day we parked in the parking structure across 7th street (that is to the East of the stadium). Very easy walk. I don't remember how much it cost, but it was worth it.
We ate at Guy Fieri's and it was ok. There were a lot of football games on and it was really cool that we were outdoors right next to the stadium. The food just seemed like it could be better. People told us to go to Willie's Tacos about a block away. I don't know if it would be good or not.
There was a place close by called *** Burgers. The food was pretty good, but it is a bit of a hole in the wall. They have burgers, gyros, and other items. The Kool-Aid main is the cool attraction 😉. I wish I would have taken a picture.