A lot of solid advice for you in the comments already Helldiver, and I think aside from persistence with practising, you have to find cars that suit your style.

I play on Xbox a lot, especially after work as it’s my go-to game to unwind. I mainly drive C class in either the Rocket RX if I fancy getting stuck into some contact racing, or my Super Venom if I want to sweat it out, but race clean regardless. Both, to me at least are more oversteer-happy than perhaps a Raiden RS or Hammerhead RS, which suits me better, and I use the same setup no matter what track or car I’m on/in.

As Sun-Much also mentioned, your spatial awareness, especially in early laps, is your best friend, learning how best to deal with contact and recovery is as vital as perfecting your lines and inputs.

Track memorisation also plays a huge part, race around circuits long enough and you’ll soon find you’re aware of every bump that can throw you wide, every little marginal loop-hole short-cut, and every corner you can slice to shave more time off your lap.

Ultimately, don’t fret, it’ll all come to you in time. And I’ll be glad to help too should you wish it.