So the Jet advice is bundled here, so that we all don't keep repeating ourselves......
1. You can fly or
drive to an objective/flag and park for some easy-ish points.
2. You can try changing the controls around, some find it easier with the controls default for shooting and driving, but on Legacy or Southpaw for flying.
3. You can fly directly into something, such as a Helicopter, or maybe another jet, for points.
4. Use the spot function (this is SELECT on PS3) to mark the enemy [they need to be in your crosshairs to do this] and earn points, you can spam it as you fly overhead.
5. If being shot down a lot, make yourself harder to hit by not flying straight and try different views to see which one helps you spot your opponent. Braking hard and turning so that you drop onto your enemy's plane's tail worx well. Go Maverick! Iceman I got your six! Or something.....
6. You can practice flying Helicopters in the second mission of Co-op play.
7. Tanx and Jeeps can be difficult to hit unless already spotted, go for the Helicopters.
8. Never try to hoover in a jet, there simply isn't room to get into all the noox and crannies, unless you are using a Dustbuster.
9. You hover by pressing the throttle up and the throttle down buttons at the same time, but release throttle up as your plane starts to ascend, then press it again, hard.
10. Practice; we know it's hard, we are all finding it hard, until you unlock flares, missiles etc, so practice your piloting skills and help your team mates from above!

👍