For questions like this (inserting links, pictures, changing the font), you need to know HTML basics. If you've never heard of HTML: don't worry. Luckily, it's super easy to learn OR just find what you need to do with a simple search through google. There are some suggestions above, but personally if you're SUPER new to it, I suggest Funky Chickens. Here it teaches you how to make links.
Links are basically:
With HTML, as mentioned above, it's usually best to google the question. For example, maybe you want to know how to change the color of the link and make the underline go away. Then, you'd google something like:
"how to change the color of a link with html" or "change link color html" OR "how to get rid of underline for link HTML" "non-underlined links"
For something like this question you asked, you might as something like how to make a picture/graphic (which an icon is) into a link. You could google:
"linking pictures" "linking graphics" "make a picture into a link"
And something should eventually come up. If not, you're of course free to ask. You can always ask me personally through the mod e-mail, though.