2.1 Main Menu
Navigate to the Appearance > Menu and add your menu. You can name it "mainnav"
In the Theme Locations check Primary Menu and save it.
To create a color background button menu item like for example "Donate" button navigate to the Appearance » Menu and add the CSS class "color" for that menu item.
*If you don't see that "CSS Classes (optional)" field for your menu items, then you need to enable it by going to "Screen Options" tab at the top right of the Menu page and there tick the "CSS Classes" box.
Navigate to the Appearance > Menu and add your menu. You can name it "Social Menu"
In the Theme Locations check Social Links Menu
2.2.1 How to add different social icons?
All you need is to add socials inside the "Links" menu. Inside the "URL" field add the social page url and inside the "Link Text" add the name of the social, for example "Facebook". After you add it to the menu, social icon will automatically show up inside the socials bar.
Linking to any of the following sites will automatically display its icon in your menu.
RSS Feed (urls with