Njem, since you know HTML you can hack your wordpress theme. It might not be "proper" but you can put some simple links or buttons up-top.
You know how to FTP into the server where your site is located right?
Go in there, find WordPress folder > wp-content folder > themes folder. Do you know which Theme you are using? Find that theme's folder.
You can add some HTML in the header.php file (towards the end), and in the sidebar.php file (towards the top if you want).
Open the file in a text editor. Find the right place. Write your HTML there, like referencing an image for a button, or just put a hyperlink.
Just make a back-up of the file you're going to change first (in case something goes wrong), and try to look at the code in the file so that you put your stuff in approximately the right place.
You should easily be able to add some new buttons in the top of the Sidebar, or quite possibly up top with your nav buttons.
if you have more specific questions then ask here