Seconding Tail scale, if you have already tried it though, there is also ZeroTier

Nope

Change your dsn to dns.adguard.com

Edit: Firefox on Android has unlocked origin as well nowadays

The unripe ones are firmer and can handle long truck rides a bit better

Most corps block vpn traffic, I know there are ways to “tunnel” traffic to get around this but I’m not very familiar with them

Usenet is still around, not hugely active but there’s a lot out there still