From your other post, looks like you are largely interested in privacy and real decentralized exchanges?

If that's the case, then I would thoroughly recommend Bisq as a place to get started trading with other users again. You download and run the software (open source, obviously) on your own machine, and it connects to other users in a peer-to-peer manner over Tor. Bitcoin trades are made via a timelocked 2-of-2 multi-sig escrow between buyer and seller. There are still centralized "arbitrators" who can step in for conflict resolution in rare cases, but I've never had to use them before. Their wiki is a good place to learn more: https://bisq.wiki/Main_Page