Social sharing, Menu and Images in posts

Hey guys! Today I installed this great theme but I have some problems.

First problem is about Social Icons for sharing post – https://prntscr.com/4ncl9o . On the picture is shown Social Icons which I want to put on my site. How can I do that?

Second problem is about menu. I don’t know how to create it. Let’s say that I want 4 Items on my Menu and let’s call them – Home, Music, News, Info. So, Home page is obviously first page and every new post has to be published on it. Music is the second page and when I write new post and I put it in Category called “Music”, that new post has to be published on Music page. The same way is with the other two pages.

Third problem is about Images in posts. https://prntscr.com/4ncmu0″ On the picture you can see screenshot of one post from Live demo of Hueman. When I write post on my site, image on post isn’t showed up. As you can see here – https://prntscr.com/4ncnbf