how to save user data / current state

Hello my yet undefined saviour,

I am new to H5P and on the verge to create a new content type.

Experimenting with my test-package worked good so far but now I am in despair, trying to implement the functionality to save the content state to make it possible to return to the exercise later.

Please correct me at the following things:

• I found setUserData() in the H5P API Reference. wich is used by the h5p-php-library ?

• Using moodle I have to install the plugIn instead of using core to get the option 'Save content state' (so I did).
• To actually save something, I have to implement: getCurrentState(), wich is called frequently if the 'save content state' is checked.
• the getCurrentState-functionality has nothing to do with xAPI wich means so far I could totally ignore everything that has to do with xAPI.
• To load the saved state, all I have to do is to insert a 3rd parameter to the constructor.

Am I supposed to do more than implementing the getCurrentState-function and (in case of moodle) use the plugIn instead of core, to make it work? (do I need to do something with Ajax for example)?

this.getCurrentState = () => {
	  return{
		  myContent: document.getElementById('myContent').value
	  };
  };

Thank you beforehand, every kind of help is much apreciated.

Greetings