Ok my server is now in Hosted tab, its ip is 37.59.52.164:6720 and running in 0.3x
I have hosted it in Hostspree.net because it offers Hosted tabs, although probably its hardware is far less powerful than that of Volt-Host, so I don't know how its performance will be if I get many players. Therefore in case of lag I might host it somewhere else, implying another ip change.

Now I have to create a forum, I'm thinking of buying a domain.

Do you want your own section for this? You could use this forums for your server maybe. So if you get players there they can check this for updates..