How do I add a new block? Where to I add it exactly?
Well, since version 1.1 the html structure has been remade to be as easy as possible. If you want to create a new block you just use a code like below:
<div class="block">
<div class="top">
<h2>Your block name</h2>
</div>
<div class="content">
<p>Something you want</p>
</div>
</div>Instead of the h2 you can have an h1 (it’s just as good). This code you insert it in the div with the class page.
Easy? 

