Ditching Cable, Need Help

Hello, I hope this is the right spot, I tried googling around for the proper subreddit but I think this is the place I'm looking for.

I'm sick and tired of being robbed by Comcast for my television package and I'm looking to move towards just having internet and using a service to get the few channels I want.

I've been looking into Amazon FireTV and their Firestick but I also want to get an HDTV antenna to view local channels, especially for when football season starts again. My only concern is that I have two monitors, not a TV so I don't have a coaxial jack which I believe most antenna's used, at least back in the day.

I'm looking for answers as I make the transition to cutting the cables once and for all

Thank you!