When you add a link to the site it should allow you to specify an href that is your fj link and the text the link should use, that is where you'd put the click here.
And what help/guidance do you need on the banner in your sig. If you want one made there is a graphics thread on the board and there have been other posts explaining how to insert it into your signature.
And book like building websites for dummies
Amazon.co.uk: Building a Web Site for Dummies (For Dummies): David A. Crowder: Books 