Optimize Website On Google Blogger NO WORDPRESS

This is a website NOT IN WORDPRESS. So you don t have any plugin, you need to be confident ad expert on code optimization html5/bootstrap/javascript/css. Website is on google blogger. What you have to do is fixing some small issue showed on google pageinsight which are affecting the overall score. Consequently, speed as well will be important. Please don t propose yuorself if you are not confident with the platform and pageinsight.