I have to be honest here with a reminder that theme support does not include support for “custom modifcations” that a person wants to do with a theme. It appears you do not want to use the default location of the copyright and footer menu and want to move these two elements into a widget position. The copyright is fine and if you want it aligned right but a new footer menu to be above and centered, this will require you to perform some custom css and possibly some other coding changes. Right now you have the copyright in the Footer 4 widget position; there is no other position above that where you can put the menu above the copyright.
I’m not sure how you plan to insert a new footer menu or how you want it to actually look (other than centered), but what I recommend first is to check the live demo of Prerence and its source code for the footer menu that is there. Then check the css for it which is found in the theme’s menu.css file around line 230, and perhaps work from that. The css styling below is for the original default location of the footer menu which is coded directly into the footer.php file.
As I said, I’m not sure how you want to style your menu, but unless you are making a “text link” based menu, usually they are list styles, it’s going to be a bit challenging if you are a beginner. If you need some great tutorials on HTML and CSS, I recommend checking out http://www.w3cshools.com