Honestly, that is awesome! Absolutely try things. Seeing what works and doesn’t is a great way to learn. The sneaky thing about hiding is that it works great until it fails utterly. (Security through obscurity.) I’m sure everyone who says “don’t do that” says it because they left some random thing open once and it was a disaster. (I lost a private wiki with all my notes back in the day.)

Keep at it. ;)

I’m not sure what you mean by non-spying, but you should be prepared for anything you put on the Internet to be poked by any number of people that you do not want poking. If whatever you are hosting would be compromised by having a DNS name, you might want to rethink your security plan.