Getting Started With PageSpeed Insights

Hi
I am relatively new to WordPress and am taking things one step at a time. So far so good (or that’s what I thought) until I took the PageSpeed Insights Test.

It has highlighted a lot of issues. But I see it as a learning curve. Am having difficulty in working out how to fix them.

I think once I can see how a few can be fixed then I should be able to take care of the rest.
The site is mdmwebdevelopment. cu. cc

And if someone can give me some pointers with the first 3 errors below;

The element <div class=”site-main”></div> falls outside the viewport.
The element Hello world! falls outside the viewport.
The element <time class=”entry-date published”>21st September 2016</time> falls outside the viewport.

Then I think that would really be awesome!
Thanks for your time!

Anthony