For me the “Knee to Knee” is the key, among other technique they taught at CSS which worked for me was “2 step”. I used to sit too far back when I hang off, which creates a problem with my upper body, but then I was corrected.
Look into TTD’s private lessons for something that is great value for riding techniques or CSS if you have the cash. I wanted to complete my CSS course, but just done have the funding for now. If you use you own bike it is not bad and if you don’t mind making a trip to NJMP; But if you have the cash having a go at their S1000RR school bike at the track proves to be a great experience.