War Thunder, what an absolutely fantastic aerial combat/deathmatch game. The controls are easy to learn and there's tons of resources online to help you learn defensive rolls and tactics, and the business model isn't hugely exploitative either. Starter planes aren't great but are perfectly viable. I bagged an 8 kill streak on my last game with the first plane you're given as a Soviet pilot.

Probably the most fun Free to Play game i've played since Blacklight: Retribution.