Improving the speed of your WordPress website involves several ways, from optimizing images to using caching plugins.
You can reduce your uploaded image size and optimise image using a plugin. For example
You can also reduce the server response time, you can use VPS hosting plan instead of shared hosting.
You should be use caching plugin to store static versions of your site, reducing server load and speeding up page loading times for returning visitors. We would recommend purchasing or plugin for free