If you really want to work on your turns and getting down go to a parking lot with about 5 cones set them in a circle and go around them at low speed getting lower and working bodyposition. Then you won't get hit by a car and if you fall over it is at low speed and you won't die or whatever else. en invest in a good set of boots and go to a track (you can rent a suit). It is about $200 but it is well worth it and you will have a better understanding of what you can do and what your bike is capable of. Also if you do decide to venture on a group ride learn the fucking hand signals and ride at the back.