Personalization Helena

Hello, Can I put an image on the top of the home page and the menu on like this blog ? : http://oiseaurose.com/ Can the menu be fixed when I scroll ? Can I put a grid of pictures from Instagram down to the page ? Can I add a sidebar ? If yes do you have example to show how it can be ? Can I have the sidebar at the beginning of the home page and then, at the end, be full-width without the sidebar ? Can I add the social widget up to the page near to the menu ? Can I change the color of the menu and frame ? Can I post videos ? Can I add a gallery ? What plug-in are compatibles with this theme ? Is the dummy content included ? Is the support included ? If yes, how long time ? Thanks a lot for your fast answer !