I think there's a bit of misunderstanding between what defines a DEX and a CEX. From what you've described, it seems you're leaning more toward building a DEX rather than a centralized exchange. And you focus more on crypto-to-crypto transactions instead of crypto-to-fiat, which fits better with a decentralized model.

Also, if you're not planning to offer email support, how exactly will users be able to reach out for help or raise concerns? Will it be through Telegram, or are you considering a more privacy-focused chat app like SimpleX? It’s important to have a clear and reliable support channel, especially if privacy and decentralization are core principles.