Very nice improvement overall in one day! The best thing you can do is seat time. Speed doesnt happen overnight.
Next thing, ride with some of the fast people if they let you. It might be shocking at first but it really gives you a sense of the speeds the car can take, but dont just go out there and try to emulate what they did. New people have tried that after riding with me and you can tell they just over drive.
Also see if some of those fast people can ride with you, give you pointers post run! Preferably someone that has a similar or the same car.
Last, keep it fun!! Seems like yo have the right mindset and keep that up! It will only help in making you faster and keep you racing
