How to Speed Up my Website?
All dynamic websites has low performances because of all elements came from different resources such as database, shortcodes, options and ...
Solutions: You should use Caching plugin to generate your final website into an static file and load it from there, we recommend "WP Super Cache" plugin.
Just install it and Turn it ON.
Also you can Minifying the CSS and JS files by another plugins such as Autoptimize or Better WordPress Minify