It doesn’t check all your boxes but pingvin is what I use to share large files

Looks like you got it! Congrats.

Router gets the public IP. Login to it, find port forwarding option. You’ll pick a public port. IE 443 and forward it to a local IP:port combo, IE 192.168.0.101:443.

Then you can pick another public port and forward it to a different private IP:port combo.

If you want a subdomain, you forward one port to one host and have it do the work. IE configure Nginx to do whatever you want.

EDIT: or you use IPv6. Everything is a public IP.

If I didn’t do anything wrong I’d ignore anyone I didn’t want to talk to and keep doing my own thing. Continue shopping or whatever it was.

Other things that happen would be unrelated (even if it’s related, I’d deal with it as a separate event). Next thing that happens is a security guard hits me, call the cops. I did nothing wrong. If they try to stop me I’d ignore them and wlk away. Physically hold me, I’d call the cops.

If I was scared for my safety I’d do everything and and anything to get out of the situation and deal with the consequences once I was safe.