As others have already written, it's a bad idea that doesn't achieve anything positive, and even threatens your privacy even more because most CEX require KYC.

If you don't want to use mixers for some reason, then you can try to make several wallets (5 or 10) and mix coins by sending transactions between them. It also won't completely protect you from all these companies that sniff and analyze the blockchain, but if you have some coins that you think could be "suspicious", then this way of "mixing" can give you a certain security in case you send such coins to some centralized platforms that perform deposit analysis. I can't say how deep they go in their analysis, but they probably won't look at more than 10 transactions in depth.