First you go to google.com, then you put in the name of your ESC with the word "manual" after it. You will get several hits. I tend to go to the results that are on the Hobbywing website.

https://www.hobbywing.com/en/uploads...61118960d7.pdf

Now read the manual, what you need is section 06 ESC setup, and the first step is Radio Calibration. Follow the instructions to a T.

GOOD LUCK!