https://simplelogin.io/ (owned by Proton) is great for this. They have a feature to generate an email address by random word or even by uuid.

iOS has Lockdown Mode which it sounds like you could benefit from.

I succeeded in doing this once long ago. Then while in the Linux vm I wiped the VM’s partition table, which wiped the physical disk partition table, including windows. Do not recommend.

Looks like you’re paying $138/yr for Proton, SL, and vpn. Consider getting Proton Unlimited for $120/yr which includes all of the above, and use Proton vpn.