Setting Up IRC server?

I'd like to install, a private, just-for-fun, installed-out-of-boredom IRC server.

Any recommendation? (e.g, easy to setup or customizable or lightweight)

what kind of stuff should I consider? (e.g, abuse, security, traffic ddos)

This IRC server won't be shared by anyone.. so no reliability-aspect should be considered
Basically I just want to learn how to set it up.

Thanks :)