Fixing errors pointed out by Google's PageSpeed Insights

Hi!

Here're the results:
https://developers.google.com/speed/pagespeed/insights/?url=https%3A%2F%2Fwww.wheelofcommerce.com%2F&tab=desktop

Is there any way I can fix what's pointed out there, for both desktop and mobile, with WPMU's guidance? Given the level of complexity and my own level of understanding in the area, I'm already presuming I'll have to hire somebody to do that, so my second question is: as WPMU doesn't indicate particular individuals for freelance jobs like that, could you guys at least indicate me a company that I can contact to take care of the job? Needless to say, I can find it on Google, but the reason I'm asking this here is because I've been a client of WPMU for years now, so I know that if you indicate me a company, it's most likely to be a trustworthy one.

Thanks.