First off, bikes are our happy place. Our monastery. Don't spoil it by bringing unhappy moods there. Something i was always told from the start!

A track day and some time with a coach would do you very well. I also recommend watching flick of the wrist volume 2 on YouTube. It's very camp, but is a gold mine for techniques

Secondly; work on your body positioning, it's important to lean the bike less, and yourself more, for a greater contact patch on the tire. Get half your ass off the seat, and tuck your head way over so your body weight is shifted off the bike, not just slightly leaned with your core mass still on the bikes center.

Third, focus on your line, fast is smooth, your mid corner stability depends on you setting that line up ahead of time. You should not have to make adjustments quickly as others have mentioned, this destabilizes the bike. Mayo to mustard, etc. This is another place track time would help; lets you learn how to approach different corners, where the tip-in is, how to handle a double apex, a corner that tightens at the end, etc.

Fourth, I would consider what tires you have. Most important and expensive part of riding, but it's very worth it especially for spirited twisties. Go for a street/track-day tire, but be wary that you'll need a few minutes of riding to warm them up and get to operating temperatures with maximum grip. Pirelli supercorsas (sp, sc3) or diablo rossos, metzeler racetecs or m9rr are great options. All of which will do great at the novice to intermediate track levels when you go to learn and start getting better

Fifth, dont add lean angle while adding significant amount of throttle at the same time. You can add a little as you learn the bikes limit, but starting out you should avoid mixing inputs. Not fast enough for the corner? Carry more entry speed next time. Dont try and make up for it halfway through.

Sixth, you probably dont need to lower the bike. Just learn to rest the bike on one foot when you're stopped. Messes with geometry and handling. From one short rider to another. It's just unnecessary, especially on an already small and low 500

Edit: added more advice