It's fairly hard because most worlds that people would actually dice at are jam packed with hosters and dicing clans, I would suggest getting a few of your friends to help you kick it off
It's incredibly hard to start a dice clan unless your famous because no one at all trusts you, pretty sure the only successfull dice clan thats started on the sythe forums is "Cora dyce"
As stated above, it is hard to start on your own. You'll need to make a website, a YouTube channel, and host many drop parties to start getting some people. You'll definetly need some friends to help you.
I started a dice clan a few days ago, it was boring as hell for about an hour then i saw someone walking round with about 50 people following him all saying drop party so i followed and it ended up he was advertising his dicing clan. I went to the grand exchange and bought about 5 mill in items [ it was f2p ] and i started saying drop party and people started following me so i walked around the g.e for about 5 mins then through the dicing area near the big bank then i took about 60 people up to juliets house and said to them "i am doing this drop party to advertise my dicing clan" "if you enjoy dicing and daily drop parties then stay in my cc" after i dropped about 20 people left my cc but 40 stayed and they happily diced with me and i even sold some hosting spots for 5mill. I made a 42m profit that day.
I'm sorry but it's not for sale. If I sell it I'll pm you.
@Op. starting out solo is the best way to do it if you can't buy into a clan. If a clan is offering 55x2 try doing 54x2 this will get you customers which will increase your rep.