If you want to refresh yourself on the original before checking out the sequel, you have plenty of options.
How the Original 'Top Gun' Producers Assembled Tom Cruise, Tony Scott
Top Gun (1986) - Release info - IMDb
Box Office: 'Top Gun: Maverick' Debuts to Stratospheric $124 Million
Behind the scenes of that Val Kilmer-Tom Cruise reunion in 'Top Gun: Maverick
How to watch and stream Top Gun - 1986 on Roku
17 'Top Gun' callbacks to watch for in 'Top Gun: Maverick
Top Gun' Stars Then & Now: Photos Of Tom Cruise & More – Hollywood Life
Top Gun' Stars Then & Now: Photos Of Tom Cruise & More – Hollywood Life
Top Gun: Maverick' review: 'Top Gun 2' is a gloriously corny nostalgia fest
How Joseph Kosinski convinced Tom Cruise to make a 'Top Gun' sequel, Features
They're not Maverick and Iceman from Top Gun. They just look it