1. Grab a virtual phone number. (using Tor and bitcoins)
2. Creating a signal account with signal-cli
3. Setting up Signal for Desktop

1) Make a hidden encrypted volume with Truecrypt 7.1a [0]
2) Inside the encrypted volume install Whonix [1]
3) (Optional) While just having everything go over Tor thanks to Whonix is
probably sufficient, it's better to not use an internet connection connected
to your name or address. A cantenna, aircrack, and reaver can come in handy

https://pastebin.com/raw/cRYvK4jb
here.