You need to read Twist of the Wrist books and get a lot of seat time on the road practicing riding techniques, not speed. As you get the techniques right, the speed will take care of itself. Forget scraping the pegs, especially in parking lots. The bike will only go as fast as you are comfortable riding it, and your comfort level will only be as good as your technique and experience. If you exceed your personal comfort level, you will likely crash the thing, regardless of where in the range of "the bikes capability" you are riding. At no time while you're riding should you be scaring yourself. If you are scaring yourself, you're going to crash.
If you practice going around in circles in a parking lot, it will improve your ability to go around in circles in a parking lot, a skill which has no practical use on the road and doesn't even simulate the real world of road riding. It won't teach you how to anchor yourself on the bike, to be light on the bars, to gauge proper corner entry speed, picking a workable safe line through the corner, where to pick up the throttle through the corner, etc. etc. Only education in proper technique (the books), and a lot of practice using that technique, will improve your riding ability.
A track school would be nice, too.
I assume you have good riding gear so if you do oops, you improve your chances of making it with minimal injury.
Get the books, practice, and then post with some more specific questions that may be encountered as you gain experience. Hope that helps.