Once you get your images under control, how about installing a caching plugin? WP Rocket is perfect for beginners because it works out of the box. You only have to activate the plugin, and your site will race! There are no tweaks necessary. However, I thoroughly recommend switching on lazy loading for images. Your blog will be in the fast lane once you do that!
If you are at the stage where you are choosing your WordPress theme, it’s very worth considering your blog’s speed at that point. There are a few speedy ones to choose from, but I recommend GeneratePress (the theme I use on this blog). Despite being so lightweight, it is highly customisable. You can achieve pretty much any design with GeneratePress.
Delve into the posts below to find out how to do all of the above.