I would like to hire a Tumblr Expert

Customized Tumblr theme. I would like a fixed bar at the top, down after the tumblr follow button that shows up on all tumblrs. It will span the entire page of the device and include from left to right: pages, title (I want to be able to change it by putting in my own image), then social media buttons. Set the page width/view to the device, and if mobile then the pages turn into three lines which the user can open and see the pages. And the social media buttons can all be turned into a plus sign which can be opened and show the social media buttons. After this fixed bar, I would like one column for the content which is centered. Under each content so it would be text or a photo or whatever, It would have the number of notes, the reblog button, the heart button, and share elsewhere button. When any of these contents are clicked, it goes to a new tab and the bar at the top is still there and fixed and the content is there centered with the notes below.