I always wanted to get my PPL, and started towards it 30 yrs., ago, things happened, and never finished it. THE MEGA airshow in the US is Oshkosh with around 10k planes in/out over the weeks events. The majority are GA with VFR rules. It's really cool how they bring them all into the airport. Several yt videos that you can watch. Here is a snapshot of them lined up coming in this year. They also live broadcast the airshow on yt. The show today was all old and new military aircraft. The have an airshow everyday from 2:30-6:30. I'm not sure if it's military or not. Check their yt channel tomorrow for it live.
Monitor airshow freq:
https://www.liveatc.net/hlisten.php?...osh4&icao=kosh
Monitor arrival freq:
https://www.liveatc.net/hlisten.php?...osh3&icao=kosh
Monitor tower freq:
https://www.liveatc.net/hlisten.php?..._twr&icao=kosh