HI, good day everyone, I am new kid here and I hope I can gain knowledge form you experts.Please pardon my english

trying to improve that one also as it is not my native language.
So I am currently doing a project where I am using a NES joystick (damn cheap) to control my robot car(A simple RC CAR) ..Looks kinda simple for everyone but for me ..I am really having a bit tough time...The first one is how to interpet the data from joystick (joystick looks like similar cheap ps2 controller).
Is this possible..how should i proceed?
Regards