We’d love to help you optimize your site but that is outside the scope of our support. As was mentioned above, follow recommendations from our documentation:
– disable all the plugins that you don’t use;
– install and configure cache plugin;
– optimize images, for example, http://prntscr.com/oeri99 ;
– contact your host to find out what can be done from their side to speed up the site;
Because every site is individual, contact us after making mentioned steps and we will check what else can be done in your case.