FOSS gamedev and creative worlds

Hey guys :) I've been trying everything to set up my own server (for 0.4.7 if that makes a difference). Nothing I do seems to quite work. I got the name and stuff of my router, I've tried to follow YouTube guides, forum guides, the wiki guide, but I don't know if it's because I'm an idiot or there's something I don't get. If someone could explain to me how to set one up, even with pictures if possible and stuff, that would be awesome.. I'm an idiot I know lol. Thanks guys.

1) We already have a topic about that.
2) What did you do yet and what didn't you understand?