One of the best peer2peer platforms is RoboSats. It uses the Lightning network (low fees) and all the traffic goes over Tor (you’ll need the Tor Browser) so it’s as private as can be.
Peach Bitcoin is supposed to be great but I think it’s only in Europe right now.
Bisq is a popular desktop application you can download and buy sats directly there.
Bitcoin meetups can also be an option! That’s in-person p2p so literally an exchange of cash for Bitcoin.
Hope this helps!
Any other good recommendations from the #plebchain ?