@Adarsh96 Hey there, reading your issue reminded me of something I once experienced.
EKF not initializing position is a separate issue but I can tell you if you're able to arm the quad amd have the motors spinning, it should be good.
What flightmode did you arm it in?
Because with some you need to raise throttle above 60% to takeoff.
Just a thought but you might have just been in the wrong mode bc quad arming means you're basically ready to fly. 😉
A