I’m not sure what “tap to pay” is and I haven’t used privacy.com. But you can attach your Revolut card to NFC in phone. Without going through Google Wallet
It also issues one-time cards that get destroyed after one use
In general it’s pretty handy, even if as pre-paid account
But how private your data really is, that might be hard to answer
If you want to access your computer from outside your LAN, it would be a good idea to at least secure it or, unfortunately the best, learn to understand what you are doing
Coming back to the topic, though, I’d start with checking these out