how can i make a clan and own planets?

To make your organization simply speak to OP about options. While you can have a clan without owning a system, to be a full-fledged server clan you must pay rent on a system (you can chose from a large selection if I'm not mistaken). Once you have done that you and all of your members must make sure that all of your characters have your clan's tags. I hope this helps, maybe somebody could explain it better.

its correct Marshal Cunningham........