There are some platform where you can sell bitcoin without KYC. You can try Paxful. Other platform such as LocalMonero , and Bisq also allows you to trade bitcoin without KYC.
Though there are many crypto exchange platforms, there are some popular and widely used platform which are believed to be safe such as Binance, Coinbase, Cryptosquare, etc. You can check these ones out.
Hey, seems like a good idea. You should do proper research before diving into this. If even if there are some similar platform, you should go ahead and do if you think it would work for other and be useful. Good luck!