In my plugin I need a helper class which gather some common functions I can call from anywhere. I had a look at the way to do that with Laravel, but I wasn't sure that it fits to an October plugin context.
So this is what I've done so far:

I put my helper file in a helpers directory: helpers/MyHelper.php

<?php namespace CompanyName\MyPlugin\Helpers;

use October\Rain\Support\Traits\Singleton;

class MyHelper
{
    use Singleton;

    public function myFunction()
    { 
      ...
    }

    ...
} 

and to use it

use CompanyName\MyPlugin\Helpers\MyHelper;

...

MyHelper::instance()->myFunction();

Now I have 2 questions:

1) Is this the proper way to use a helper in an October plugin ?
2) How can I autoload the helper class ?