And break your project down into small pieces.
- First get the motors to work. Consider using the servo sweep tutorial as a starting point for that to run one ESC.
- After you get that working, change it to make both ESCs work.
- Then tackle the controller without using the EXCs at all, just print to the serial monitor the values you get from the controller.
- Then combine the code that reads the controller with the code that talks to the ESCs.
Will your controller be wired directly to the tank or are you using wireless communication? If wireless, then you might need some more hardware and more steps in the piece by piece list I made above.