I've just started taking lessons at St. Charles County Smartt Airport (Missouri), a smaller untowered airport. I've listened to larger airport towers like JFK, SFO and LAX for a while now but I want to become more familiar with CTAF-style radio communications. Theres a lot of CTAF feeds on liveatc but I'm not sure which one would be "best" to start with. Which feed should I start with? The busier the feed is the better, I imagine.