Want to build a server

[a66as]

Hi guys, i want to build a small server just for the heck or if and learning more about them. Wouldnt mind using it as a games server to host games on but this isnt that important. i have the following currently that i can use on it.

2 TB hard drive
250gb ssd

what else would i need? has to be mini itx build

 

[a66as]

I want to learn how to setup and install servers, and learn how to host games on it and etc. dont want to spend an arm and a leg though ill look into the hp micro server