How to Create Sub Menu in WordPress Login to your WordPress Admin areaGo to AppearanceGo to MenuSelect the pages you want to add to sub menuClick Add to MenuNow, drag these menus under desired menu buttonClick Save Menu That is all. Now, you go ahead to visit your website to check your sub menu.
How to add / enqueue bootstrap CDN to WordPress. How to enqueue bootstrap to WordPress. Get Bootstrap CDN or Download it https://getbootstrap.com/docs/4.0/getting-started/introduction/
How to Align WordPress Logo in Center How to style WordPress Logo in Center Link: WordPress Custom Logo Function Custom Logo
How to Add Custom Logo to WordPress Theme. How to align WordPress logo in the center, on the right, and on the left. Get the code from WordPress Developer Functionality page. https://developer.wordpress.org/themes/functionality/custom-logo/