speed up load time and improve google score

Hello I want to improve my site speed and also improve my score on google page speed insights. How many pages are going through the improvement? What is the final result that I will get in a fast loading site? What is the end result I will get on google page speed insights on mobile? Does the Eliminate render-blocking JavaScript and CSS message in above-the-fold content Will no longer appear? I have CSS files created by installing plugins, some of the extensions use only in product page, can these files load only where they are used and not on the homepage? Do you reduce the number of calls to the server regarding css files and images My URL is [login to view URL] I use a template OceanWP Thanks Moshe