There are two schools of thought for new folks and what they should or shouldn't do to their cars while learning.
Thinking 1: Don't touch anything and "learn to drive"
Thinking 2: Set the thing up to a known good starting point and "learn to drive".
I'm a #2 type guy, and not just because I sell parts (seriously, in fact I am stubborn about not selling stuff that won't help), but because I teach autocrossing and have for years, and at more than a casual local level. In fact when I teach I actually earn more per day than a Skip Barber or Bondurant instructor.
Let's think this through. If you were learning to drive a stick, would you want to learn in a car with terrible throttle tip in, and a clutch that is super touchy, and a gearbox that isn't synchronized? Probably not. But yet folks seem hell bent on telling others to drive the car stock, they'll learn more. They won't, it's not easier to drive stock it's harder, much harder. And slower. And trust me, the fastest way to wreck someone's confidence is for them to be way off the pace in a hard car to drive. The harder they try, the worse it gets.
If I want to learn to shoot a handgun, I'll start with something pretty close to what I want to use. Doesn't need to be competition grade or anything, but if you know anything about guns you know that tuned ones tend not to be harder to shoot, cheap box stock ones are the worst, typically.
Grip is grip. If you have more of it, and the car behaves more like you want it to ultimately want it to behave, you learn more about driving it, and without excuses.
It's common for folks to not want to change things when starting out. I get it, it costs money. The upside is it makes a better driving street car too.
But really it takes away excuses on the car being out to lunch and not everyone can handle that.
For every argument for, there is one against. In the past I'd recommend folks start on tires less than Hoosier's, something that is close but didn't need to have every tenth worth of speed. But since so many of you guys are running either STX or RTR (or whatever it will be in the future), the street tires wear well enough that it's silly to be out there skating around on crappy tires. Camber is easy to add and it's so little and the car is so light it doesn't tear up tires. Shocks and the bar make the car more forgiving, and as you learn you can play with shock settings to suit your taste.