I actually got it to work, but since it only works as long as my PC is on I was wondering how could I make an online one. I carefully read the dedicated section on GitHub, and watched a tutorial, but I can't find how to host it on an online server. Any help is appreciated!
But if don't try to understand I'll never be able to properly setup a server...
EDIT.: Could you tell me how can I name my server (instead of using [myIP].psim.us)? Thx ^^