you can catch a live game weekly on the MLB channel on youtube, including recordings of previous games, so you can get a feel for it if you don't know it. The jargon takes some getting used to. Try this link for some background.. I wouldn't watch it live without knowing at least the basics. It's a great sport IMHO. Anyone beats anyone, really.

The fans like to do 'tailgate parties'. They turn up into their huge carparks with the SUV loaded with a barbie, burgers, beer, chairs etc and have a get-together. They'd most likely welcome you.

https://www.howbaseballworks.com/TheBasics.htm