What are the optimal settings for each send/receive alias (Outlook.com)

I'm doing a reset and starting from scratch. I'd like to get it right this time :-)

Go to additional email options in Outlook.com. What are the most current recommendations for email accounts (send or send and receive?)

I don't want recipients to see my primary email.

And ideally I would like email from all my Comcast accounts forwarded to my other alias, (*** Email address is removed for privacy ***.)

Quite honestly, I'm still a bit unclear about some of this....I think something got corrupted during the transition to Outlook.

I don't know if this is relevant...Within my primary Microsoft account, I show US-Business profile and a US personal profile. I don't know if it's because I once had an Outlook 365 subscription or because I was registered as a developer.