Is forking a coin like monero or bytecoin the only way to create a privacy coin? or is there some other blockchain? like erc-20 but for privacy coins

 How can I create a privacy coin like monero, with all the same security features like ring signatures? What blockchain should I use?

I need a privacy coin like monero, with the same security features (ring signatures etc.), and list it on exchanges. Will pay for someone's advice. Does anyone know how to do this?