Parking near the stadium could easily run you more than $100. And it's nearly impossible to get an Uber from the stadium after the game. The casino is more than $100 and it's very hard to get out of it. Definitely a shuttle bus of some sort is the way to go. I have a friend with a season parking pass and we carpool into the spot. Even that takes forever to get to and it's a huge walk to the stadium and the stadium is so huge that I always get my 10K steps just going to the game.
I'm athletic and don't mind the walking. Need to give yourself a lot of time so you don't miss any action. I start at 9am for the 1p kickoff. Best of luck to you! The stadium is a must see regardless. And the matchup with the Browns should be a good fight.