i haven't found mutch info about this, and since the game just started you don't c many people arround who are in one
but i'm wondering, are you gonna be able to creat a guild/clan here
Yes, you can create a guild/clan in FFXIV; it's called a "linkshell" after the chat tool it uses. I don't know about you, but I see lots of people who are members of linkshells. See someone with a heraldic shield icon on their name? They're a member of a linkshell and the icon is their linkshell symbol. Check the wiki for more information.