Multiple Apple Email addresses on 1 account? Can i have 2 separate email addresses within my one iCloud account? I want to use 1 for important stuff and a separate 1 for online business & junk activity

apparently Apple allows me to set up “aliases” but I’m not sure how those work.

Will email sent to the 2nd alias show up on my iPhone under my main email address? Will I be able to distinguish incoming emails as being sent to main e-dress vs the alias e-dress or do they all look alike?

Does the alias lead to my Main e-dress thereby opening my main dress up to infinite spam?