Depending on what word, phrase or image/button you want the link to be , implementing a link using HTML is not very hard. For example, creating a classic "click here" you will need to embed the following code:
click <a href="http://www.yourlink.com">here</a>.
Now only the "here" word is bound with the link, if you want the hole text , simply move it inside the code, for example:
<a href="http://www.yourwebsite.com">Your text that will reach the link</a>
To add a link to an image/button, things don't really go that far:
<a href="http://www.yourlink.com"><img src="yourimage.jpg"></a>
If your image is not in the same directory(folder) with the page you're embedding this code on, you will need to add the full location of "yourimage.jpg", for example:
<a href="http://www.yourlink.com"><img src="http://www.yourwebsite.com/images/yourimage.jpg"></a>