To begin, navigate to the Toolbar > Edit with Elementor > Header

Or go to Templates > Theme Builder > Header > Edit with Elementor. Control the layout, conditions, rules and styles of the header template. 

Please check these guides for further information:

Create Headers Using Elementor

Guide to Vamtam Elementor Builder

1. How to edit the logo image

You can edit the column and the Site Logo styles:

To set the logo size, visit the Style section:

You can edit the Logo image, Site title and Tagline in Customize > Site identity:

You can check this guide for more details: Vamtam Elementor Themes: How to edit the Logo image, Site Title and Tagline?

2. How to edit the menu/navigation 

Click the "Edit column" icon to edit the navigation background, borders and layout.

Click the "Edit Nav Menu" icon to select the menu and edit the navigation styles and layout.

3. How to edit the Book a Visit button