Thank you to everyone who responded, and I apologize for not being more clear on my goal. Doug Miller is correct; I was asking how to create a second email account to separate personal and business email messages. I was asking that because I had assumed, in Doug’s words, “it’s a lot easier to use two separate email accounts.”
In retrospect, I should have asked myself if that’s true. Is it better to have separate email accounts rather than separate folders in one email account? If it is, then how much granularity is appropriate? Do I have one account for friends and family, another for banks and credit cards, another for rewards programs, another for government interactions, and so on? What is the stopping point?
It seems that the main advantage to an alias would be to see who is sharing my email address, but that works best if I have as many aliases as contacts. Am I missing something? Michael Paine, how would I send email from email@example.com if I’ve never had a mac.com address? Sorry for the ignorant question.
I was asking about getting another iCloud email address because I thought that made more sense than a Google email address based on privacy issues. Once upon a time, I investigated getting a commercial email address (like at pobox.com) but I never did anything. Would there be some reason, if I wanted multiple addresses, not to get multiple addresses with Apple? Michael, you said you would avoid setting up a second Apple ID.
FWIW, almost all my email is sent from Mail on a Mac; I hardly ever send using an iPad. I believe I have never sent email from an iPhone. I do read email on iOS devices.
Thanks again for the responses, and thank you for your thoughts on organizing my electronic life.