Theme Speed Problems mainly in Mobiles

Hi,

I just installed the theme with the demo content and other demo content and I runned a speed test
I haven’t uploaded my content yet and the result of the speed it:
for Mobile 33 out of 100
and for Desktop 77 out 1000
the site is here
professional-business-communications.com/new-site

https://developers.google.com/speed/pagespeed/insights/

How can I or you improve the speed since this score is really bad.

this is on of the main issues but there are other

Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 8 blocking script resources and 9 blocking CSS resources. This causes a delay in rendering your page.
None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Thanks in advance,

David