I want to create something's where people able to buy sell also with different type of coins trading which will be unique. and able to list their own coins also
free listing and create and help community to grow day by day.
Trust me, your idea is not going to work. I have been in crypto for a while and have seen a couple of business models, but your idea seems the worst to me. Rather than creating such a community, you may create something that would be more advanced than Local Bitcoin or Paxful. So you may draw attention from these platforms' users. Listing brand new tokens and doing bla bla… won't be a wise decision. Rather, it would turn into a lost project.
However, if you are a developer and want to do something for the crypto community, then create something that would solve real problems in the crypto industry. There are a lot of concepts that would solve real problems in the crypto industry. If you want to create an exchange, then better; there would be spot trade and P2P as well that would help people to get fiat money. Otherwise you may only focus on P2P as well but with the most advanced technology. I will advise just forgetting about new coin listings, etc.