Once you understand the basics of it you can start selfhosting all sorts of applications from/on your laptop with very little effort. For Docker Command Line Basics there are tons of free tutorials online. If that’s to big of a step in the beginning, start with a Portainer (spinning it up is basically just copy and paste one little command) the rest can be done from the GUI. Docker will also help you to figure out what you might think is worth „selfhosting“ for yourself. Because selfhosting is almost like clothing: Everyone has their own taste and style.