How to Connect Socials

Hi, I am editing a page for my site: viszerra.com, and I cannot figure out how to actually connect my socials to the instagram widget or to the social icons widget. Also, is there a way to change the font/color of the page's title as well as the background color? Finally, how do I center contact info (through the contact widget)? I'm having many issues in customizing the site how I want it to look.