Hey men I am attempting to activate a sidebar for wordpress icons.

So my HTML appears like this:

<aside id="leftSidebar">
   <section>
      <h3></h3>
      <div class="contents"></div>
   </section>
</aside>

So I wish to place the widget inside "contents" and it is title in h3 tag. How my activate function ought to be and what php to set up my html as needed? I did not find any good examples near mine and so i appreciate any help 10 x a great deal ahead of time.