What about something like Posteo or Mailbox? I've heard self-hosting email is hard for newbs, so I've been thinking of getting a domain and connecting it to something like the above. Getting a domain does reveal your identity, but email is also not really private. Also do you have a domain registar recommendation for email?
I currently have Proton unlimited, but I really only need the VPN for obvious reasons. While I do use the drive, I also have filen. For passwords I use a mix of Bitwarden and Keepass. I do use the hell out of simple login, but that can be replaced with Addy or something else. So I don't really need Proton unlimited.
"Permanently locked bootloader" means you can't unlock the bootloader so you can flash a different OS. If you can't unlock the bootloader, you can't flash. A lot of phones are like this, like Samsung's galaxy series. I got really fucked by Samsung with the S10 because of this. You need to buy a specific type of phone and security patch if you want to flash. I went with the Pixel bought unlocked from Google so I could use GrapheneOS. It was very easy to unlock the bootloader and then relock it back. I noticed you said the pixel does not have good reception in your country, I would look more into this before going with it if this is the case.