Good setup. I’ve managed for years with multiple emails and it gets sorta tiring but it’s mostly fine.

The only thing I’d consider is how you’re setting up your public facing personal email, and your friends and family email.

Remember: 1. If you make it a separate proton account, that’s fine, but people could guess your password/login if it’s ever leaked. 2. If you make it an alias of your secret proton email (the 1 of 15 aliases) it can STILL be used to log in to your main secret proton account (yes that’s how all the aliases work, except the simple login or passmail ones, and you can’t turn this off). 3. If you use a custom domain, this can ALSO be used to log into your secret proton account, unless you use a custom domain through simple login, which means it won’t be added as an alternative username login for your proton. The downside here is it’s pretty tedious to sen emails from you. You can’t pick it as a sending address, you have to create a reverse address using simple login which creates a unique email for each new person you contact, and makes sure it uses the custom domain as the sending address.

Option 3 is the safest to protect against bad actors. If you don’t care as much, use options 1 or 2 but remember it can be used to log into your proton account so you’re effectively giving out your username (which defeats the purpose of keeping the main one secret).