I'm much faster in road racing, but principles are the same. You have 4 tires and they all have max grip. A brief liftoff of throttle going into an corner will put weight on the fronts to help turn in. That is fundamental.
Trail braking is also massive. Typically coming into a hard corner, you want the initial brake application to be hard and fast, just short of locking the tires. Then trail off the brakes and ready for throttle at the apex. Rule of thumb for road cars is 80% braking done before turn and trail off the rest of the 20%. If you force yourself to go slow and working on hitting the *apex*, everything else will follow.
Definitely turn off the HUD arrows and just use the copilot. He will screw you sometimes, so listen carefully and as always "Trust. But verify"lol
If you're using an H shifter, you have to force yourself to learn to rev match/heel toe. And left foot braking is more crucial in rally than any other discipline I know of. The best help I got from that is get your left heel in the ground like your right is when it uses the throttle or brake. You instinctively want to mash the brake with your left foot at first because its muscle memory says to mash it like a clutch. But, left foot braking doesnt take as long to learn as it initially seems.
Hard braking = right foot and revmatch
Stability braking with no downshifting = left foot braking.
A handbrake was too much for my rig, so I had to get rid of it and not having it definitely hurts some of my times, but it isnt the end of the world.
And yeah, Louise Cook is a beast of a driver. Really surprised she hasn't secured a legit sponsor in real life and hope she does. She appears to be quite fast on the F1 sims, too.