For Elementor from the tyler website, the template needs to make a menu at the top, how to implement it?

Question

WordPress

https://www.youtube.com/watch?v=HQO4qrHzhP0&t=233s
This tutorial tells you if you use a photo in the background. And if you use ready-made templates for the page, for example, from the Tyler website
www.tyler.com/templates , where there are a bunch of ready-made templates. And now I need to make such a transparent menu on the page of one of these templates, which will be above the templates, and then if I move down, it will move forward. Here's how to implement it using
Elementor ?
that you need to upload a photo, and by manipulating the addition of sections to make such an effect. And if there is already a ready-made template, and you need to make the navigation menu between pages at the top so that it is above the template, how to implement it through Elementor?
Page that needs help: http://yrchikpu.bget.ru/development-services/
Just don't need to send in HTML, CSS, Jqerry , I haven't gone deep into this jungle yet, I want to do it using elementor plugin for Wordpress