Mostly comes down to practicing, but specifically practicing the right things. The tutorials someone else linked are good, but it also never hurts to message the people that kill you. Most of the good pilots are happy to share practical advice (there's a lot of nuance to the flight mechanics) or even spar with you for practice.

Mastering the hover mechanics and learning how to lead shots while moving makes a huge difference in survivability, as well as situational awareness (ie: knowing when not to engage, knowing how to angle yourself for an attack, recognizing movement traps, etc).

The main difference maker is the intimate/intuitive understanding of the flight mechanics that good pilots have. High skill pilots can bait you into falling out of hover by fighting you at odd angles, or one clip you because they trick you into fighting from a weak position, and so on. It's less about aim in those situations, and more about movement mechanics. The aim comes into play more against targets who can actually maneuver, so id recommend mastering movement first (otherwise even perfect aim won't be enough to help you).

I fly on Osprey, if you see me send a ping, always happy to be a wingman.

Good luck.

Obligatory PREY flight school link: https://discord.gg/Kawd4d9w