The header link requires that you activate the Joomla SEF rewriting based on the htaccess 'Use URL Rewriting' So all 'index.php' will be removed from URLs, it's also mandatory for good SEO and AMP indexing.

The navigation bar can be restyled with custom CSS or completely eliminated. You find plugin settings to do both things, parameter 'Elements to remove by CSS selectors' or 'Custom CSS styles'. The plugin is already developed in order to let you customize almost everything using settings. The PDF docs explain in details all possibilities.

Links displayed on AMP pages are already automatically turned to link only to other AMP pages.

'Module name': it's the real name of the module in the Joomla database and filesystem. For example in the case of Maximenu CK it's 'maximenuck' or 'mod_maximenuck'

'Module title': it's the title of the module instance as appearing in the Joomla modules list. It's case sensitive and must be specified exactly as it appears.

JSitemap is able to generate a sitemap including AMP links, it's the specific AMP sitemap.