There are always more things. Once learning how to setup a server, there come more servers to learn about. After learning to program in one language, there come other languages and interesting programming projects etc. And along the way, you’ll hear about and discover other interesting hobbies to check out. Maybe learning how to lockpick and learning how to program combine to learning about hacking, or cyber security. It goes in and on. There are always more interesting things to learn if you’re curious.