nextdns or mullvad？

I haven’t heard about nubo till now! Probably very few people here have experience with them. Looks promising, but kind of risky since we dont really know if its trustworthy or longstanding

Mail and calendar: i think mailbox and posteo should work well, they both support IMAP for mail and CalDAV for calendar, just get a nice client(surprisingly not many for calendar standard protocol. thunderbird on desktop and etar/fossify calendar on android. stock one on ios)

VPN: MullVAD is the best

Drive: Check filen, it’s cheaper and better, and has powerful CLI tools

Pass: Maybe unofficial self hosted version of bitwarden. It’s called vaultwarden, and don’t be afraid of selfhost, basically all you need to do is docker compose.