The most tech savvy I have ever gotten with a friend is using Signal. I guess if I truly care about privacy is should use GPG on whatever can use it, but I don't do a lot through the internet that does not obligate my identity, like banking or university stuff. I tried to be random with using aliases when ordering stuff online, but more often then not it was a hassle with family members getting confused. Plus, there has been times when I need to sign or pick up from the delivery center due to some error, and I am glad I used my name since they look at ID.
Social media is like the only reason to stay anonymous.
This is true. Email is so cheap it is practically free, which is why spam and scams became so successful.