If you want to refresh yourself on the original before checking out the sequel, you have plenty of options.
17 callbacks to 1986's 'Top Gun' to watch for in 'Maverick' - Los Angeles Times
Watch Top Gun
How to watch 1986 'Top Gun' movie with original cast - Los Angeles Times
Top Gun': Behind-the-Scenes of the Making of the Iconic Action Film - Men's Journal
What happened to the original Top Gun stars who WON'T appear in the sequel?
Val Kilmer - Wikipedia
How to watch Julian Sands' most notable movie roles - Los Angeles Times
Top Gun': Behind-the-Scenes of the Making of the Iconic Action Film - Men's Journal
Everything You Don't Know About The Making Of 'Top Gun
Will 'Top Gun: Maverick' Boost Navy Recruiting? History Says Probably Not - USNI News
Top Gun 1986 Cast Signed Autographed 8x12 Inch Photo COA
Watch Top Gun (1986) Full Movie Free Online - Plex
Behind the scenes of that Val Kilmer-Tom Cruise reunion in 'Top Gun: Maverick