Get your ass on. Multiplayer server, that’s better training than AI anyway. Find a wingman to work with you and you’ll learn loads. That’s what I’ve done with BoS in the cute little I-16 and when I got my F-5 and got back into DCS.
Can completely confirm that in a more natural setting like a server that the RWR won’t help much unless the enemy is a noob and is using radar. Get in the air, look at the map to figure out a good hunting ground, use the good old MkI to spot your targets.
Odds are you’ll never see who killed you, as is true in real air engagements.