In order to do the quick times the most important thing is to truly understand how the car will react, to any input at any time, and no offence but that takes longer than 2 days
In fact for most people it may never be possible, I know I'm not there yet even with things like the Skippy/Late Model which I've driven a lot, but I am at the stage where I'm 'driving by feel', rather than 'driving by rote' which I was doing at the start.
Once you can at least feel/understand what the car is doing, or will do, most of the time then it becomes possible to drive 'on the edge' without actually being as close as it might seem now. If that makes sense?
For example in the skippy at summit point, into T1 I know I can brake late, get the car almost sliding into the corner and plant the throttle way before the corner, the front right tyre just skimming the kerb, and then drifting out to the outside with far less steering lock than I ever thought possible. Now I'm not good enough to do that consistently, but I'm good enough that I can aim for that, and more importantly, when I do something a little bit wrong I can keep control of the car, and even keep the speed up more often than not.
I remember when I started and that level of control I thought was impossible, it was massively frustrating as I would try to match the quick guys and just crash a lot, I'm not sure what the exact process was that I went through to get to the stage I am now (and just to make it clear, I know I'm not that quick, but my pace I'd class as 'above average'), but I'm fairly sure the main thing is just practice. Not just practice in the car but try different lines, eg wide/tight entry/exit of corners as if there was someone on your outside/inside both prepares you better for the race and also inevitably puts you into an uncomfortable zone where you can learn more about how to control the car in a different situation...
That probably doesn't make sense, but essentially it boils down to just practice, lots and lots of practice...
