Need Help on Lucida Pro Customisation

Hello Guys, I recently purchased Lucida Pro version for my website and there i am facing some issues which i would like to highlight front of you, details are mentioned below. I want to customise my website as Lucida Pro (https://catchthemes.com/themes/lucida-pro/) Demo version is having and wanted to replace all those sample content and images with my website (http://www.nepaltourandadventures.com/) content, menus, images etc. So here i request to you kindly have a look on it and help me on the same asap. How to Resize the Menu Fonts How to change the images of Header How to Add Primary Sidebar How to Add News Letter How to Add 1.2.3.4 (Numbers in the Home Page) How to Add pages below the OLD Pages Tab of Home Page How to Add Instagram How to Add about us, Privacy Policy etc. pages on footer Thanks in advance :-) Regards, NTA