Idea for a device to automatically mute TV commercials (regardless of TV)
expandmapping.substack.com
expandmapping.substack.com
As for the advertisement detection... that's the hard part. You'd need a well-tuned solution that doesn't break on scene transitions or channel switching. Definitely an easier project than it sounds though, and I recommend looking into that stuff if it interests you =)
There is a fairly new device called an M5stickCPlus2 that you can get around 20 USD.
I know you said you don't have any experience with Arduino but Device has a screen a microphone and an infrared LED and can be programmed with an Arduino, it has everything you need to listen to the TV and mute it. Good luck