Tutanota with a subscription gets you 5 email alias addresses.
Reserve one for your banking and other critical transactions and NEVER use it to register on any other site.
Designate four "throw away" addresses for everything else. These are linked to your main account. they arrive in the same inbox, you can reply to them as normal and you can use any email client of choice. (Just don't do something bone-headed like use Google, Apple Mail or Yahoo as your mail app or THEY will do the associations and defeat your entire plan!)
When one address becomes spam-laden or compromised in any fashion, kill it and make a new address.
Keeps trackers from associating your real address with your spending habits and your "social media" activity.
I found Proton does not play nice with Linux, but Tutanota does.
I also use a subscription password manager that suggests complex passwords for logins, auto fills logins and assures I do not have identical passwords on any sites. It will also warn me of any compromised email addresses in the "dark web".