Then you may do so, first you must build the Clan Castle (40,000 Gold) then you must pay another 40,000 Gold to make a clan. I am sure people will be able to give you more information.
I suggest waiting a little bit more to making a clan(maybe silver I +) but if you do want to you have the option to choose a clan symbol and put a clan discription.You can also invite people and promote people.Beware of hoppers though.They will just take your troops and leave.If they don't say "hi" or something and just request (mostly high tier and level troops) then their probably a hopper.
While the title may be 'hi' the actually content is clan based, bordering on Q and A.
But the Clans board is for advertising a clan. He is not advertising, he wants to know how to make a clan. Wouldn't that put it on the Questions and Answers board?
One of the things you NEED when making a clan is a system to kick inactive players. It doesn't have to be strict, but you need to kick those people who join and then sit in your clan for months not doing anything and make you lose wars.