Luckily switches are relatively inexpensive and very simple to use and install. A switch is basically a way to extend the number of ethernet ports that you have access to. They come in sizes from 5 to 48 for home and small office use and even larger for larger business. The switch I purchased is unmanaged meaning there is no software to install and it provides no functionality for managing network traffic or security. Which is fine for my home use.
Setup was extremely easy. It is a powered switch so you need an outlet to plug it into. Then you run an ethernet cable from your router to any port of the switch. Then just connect any wired device to the switch via ethernet cable. The switch is fan-less so it doesn't make any noise which is nice if you need to put it in a room where you need quiet. It does have lights on it for each port but I have my switch behind a cabinet so the lights don't bother me.
The only aggravation with the switch was the instructions told me to download an app to register the switch but the app provided no functionality to register. Pretty useful device for short money that most smart home enthusiasts probably have or will need to have as you build out your smart home.