How do you watch live?

Hello, I'm not sure if this is allowed here. As a long time fan and cord cutter, I've been wanting to get back to watching the show religiously. It's on ABC 7 in my area. How do you watch? Roku? Sling tv?

Edit-- So I got an HD antenna and it didn't work. I got 2, 4, 5, 9, and a lot of news channels, and random channels.