Website optimization and SEO work

I have a temporary website built. 1 week old It need to be optimization. for my google ad campaign . Even though I am
researching and planning to build a new website in the next 2 month .I need these one up and running now without errors. here are the test I have don that I need to be fix

https://developers.google.com/speed/pagespeed/insights/?url=lazaro.com.au&tab=mobilehttps://www.woorank.com/en/www/lazaro.com.au
https://seositecheckup.com/seo-audit/lazaro.com.au
I have a price from the freelancer that build the website , I am not happy that he build the website with these issue so that he can charge me to fix it .
I need this completed quickly . I will pick the freelancer who can show that he has the knowledge and skilled to complete without excuses. I have a reasonable price