HPDE (High Performance Driving Events) are a great way to learn car control. They offer a diversified and comprehensive curriculum for all level of drivers looking to start from the ground up to just polishing their skill with some track time. Many car clubs such as the SCCA and NASA as well as some more brand specific like BMW-CCA or Porsche Club of America can also offer some training courses to non brand owners. That said they can be pricey. Alternatively you could also seek out local autocross events which offer an excellent starting point for learning car control. Some criticize these events as being too tame but they actually are quite important. Learning to feel how the car reacts at slow(er) speeds should be the springboard to high speed driving. You can't learn anything if you don't know how to listen to what the car is telling you below 60 mph. Plus it's not true that Auto-X isn't very exciting.... the corners come at you at 4 times the frequency then at a racetrack so you really gotta be on your toes and learn to plan ahead all while keeping in touch with your car.
It really is all up to your budget. You can make it as cheap or as expensive as you want. When I get a chance to I participate in local BMW-CCA run Auto-X events because they are only about 35 bucks for an entry. That gives you 6-8 good laps which can be done with an instructor (which I highly recommend). It's how much money you're willing to invest in your skill that makes all the matter. If you value something a lot you may want to put a lot in it it all depends on what you can and want to do.
Hope it helps.