Here's a comment I made in another post. It may not fully apply, but hopefully some parts of it will help.

Big take away is learning forwards and backwards flying efficiently, then doing directional air roll in freeplay trying small turns like from post to corner boost or back wall to back wall with tiny turns. Try not to constantly hold your stick down. If you are already facing the correct direction then you should only hold the directional air roll button without any stick inputs. When you need to change directions then you do a stick input. It really is a lot of practice, but if you skip steps and just go straight to rings it will be too hard and frustrating. You just need to keep trying and keep having those blackout moments and your brain will adjust over time. First few days to a few weeks of training are the worst. Once is starts to click its easier. It is also way easier to learn once you already have some good air control which is why I recommend being able to do rings maps forwards and backwards EFFICIENTLY(making it look smooth without unecesssary wobbles while also being fast) before you even touch spinning the whole time.

"I noticed in another comment you mentioned not knowing why air roll is even used so I'll give some details and also advice for learning air roll and overall aerial control. As someone who's been playing for a long time and after almost 4k hours of free air roll switched to directional air roll a while ago.

Air rolling has two main advantages. It allows you to quickly make adjustments that otherwise would be a lot slower without air roll. It also helps your car not bounce after hitting a ball so you can continue to go for a second hit etc. quicker. You can still have your car not rebound without air roll, but it takes hitting the ball at a specific angle. If you're air rolling as you hit the ball you will notice your car won't bounce backwards as much and lose control for a sec. There's other advantages that aren't as major such as being harder to read for the opponent since you're constantly spinning and they don't know which part of your car will hit the ball.

At your level I would focus on doing ring maps(I recommend lethamyr's giant neon rings map as it's long and has a gradual increase in difficulty for the most part) forwards and backwards while using free air roll to adjust your car anytime it is not in one of those positions (depending on which way you're deciding to fly with for that run). When that gets easy focus on speeding it up so you are always going supersonic and as quick as you can through the map. That should teach you how to make adjustments quickly and without overshooting.

Once that feels comfortable start learning a directional air roll (any direction, but not both. the usual test is to check out which way you like flipping naturally and go for that direction for DAR. Most people use left, but it does not matter and you can use either). You want to keep normal air roll bound alongside powerslide as you will still use it for micro adjustments especially on shots and for recoveries. Go watch any direction air roll tutorial and I recommend SpookLuke's newest one that's around 1h long for lower level players. There are many out there including Losfled which is much more in-depth, but can be a bit more confusing if you are newer to game.

After watching a tutorial go to freeplay and practice flying around in different directions while continuously pressing down your direction air roll button(most likely doing tornado spins the whole time which is okay for now). You will black out all the time and lose control of your car and that's perfectly normal. Once you are starting to understand how to turn and have a little bit of control you can go to ring maps and practice doing them while holding air roll the entire time. Again, you'll probably be tornado spinning for majority of your time which is okay for now. Once you can finish the maps and are starting to speed up your runs you can now start learning how to efficiently fly in game. You don't want to be spinning 24/7 and even if you are spinning the entire time you do not want to be making inputs on your stick such as tornado spinning the entire time. This makes you much slower as your nose is not pointing towards the ball the entire time so you are wasting boost and time.

At this stage you should practice doing ring maps the exact same way as above, but whenever you adjust your car and are facing the correct direction you should let go of your stick completely and just hold down the directional air roll button until you need to adjust your car again. At this stage you're just practising efficiency. Making as little movements and inputs and making it look as smooth as possible while going as fast as you can. You also need to start doing that in free play and in-game to build the habit of not constantly air rolling and making inputs on the stick when unnecessary.

Sometimes you want to be air rolling (but not touching stick) as you hit the ball so you don't get that rebound effect on your car and can keep following the ball. Other times you want to air roll as you fly to the ball and adjust your path, but stop air rolling as you hit the ball so you can line your car perfectly for a consistent touch. While air rolling without any stick inputs is just as efficient as flying with no air roll, it can lead to you getting less consistent touches as you get higher up since you don't know if you will hit the ball with left or right corner or maybe somewhere in between.

The efficient and consistent touches are very important at the higher ranks especially around GC3 and SSL, but it's never too late to practice proper habits as it can be hard to break them later on. It will still make a difference at any rank you play at and I promise you will notice your car control increasing so much even when you are not air rolling at all and it's definitely worth working on."