Problem with Page Speed

The theme is really beautiful graphically but extremely heavy. Looking at my site with PageSpeed ​​Insight it complains about many improvements that could be made in particular regarding css and javascript, also to avoid the rendering block, and suggests to postpone what is possible to postpone. Do you have a way to check if there are optimizations of this kind that you are able to do? See the report: https://ibb.co/927xyVG Thanks