For me it was creating a minecraft server for my friends. I looked up Youtube tutorials, got help from my dad to port forward, and started installing plugins.
Then it was Minecraft mods. Back in the day you had to "unzip" the Minecraft jar file and manually drag and drop new classes into the jar. You also had to delete META-INF, good times.
Same here. I started by hosting Minecraft servers on a spare PC I had. Then I taught myself web dev/design since I figured my server needed a website. Later I got into mod & plugin development. I also spent a ton of time using the ComputerCraft[0] mod to program in-game robots (turtles). It's been over a decade and my love for Lua is still stronger than any other language I've used since.
Then it was Minecraft mods. Back in the day you had to "unzip" the Minecraft jar file and manually drag and drop new classes into the jar. You also had to delete META-INF, good times.