custom administrator email module

[Todor Inchovski]

Hello!

 I have to create a module, which adds a button on the product page, where a customer can make an inquiry about the product. When the button is clicked, a modal pops up where the customer inputs their credentials. The modal is already created.
What I need to do is: 

Send an email to the administrator with the customer credentials, product attributes and the product name (as a subject) on clicking the submit button in the modal.

I looked around and found the prestashop dev docs tutorial, but I do not really understand how the email template is created and used. Also I do not know how to trigger the sending of the email with my submit button.

Some guidance or link to more detailed resources would be appreciated.