Any terminal follows Unix Linux terminal commands. You can learn linux on freecodecamp.

Fact is that it is actually hard to setup on this phone because we going OS into OS:

> Android > Termux android terminal (pkg install package_name) > ubunutu (sudo apt install package)

Tor (onion) is great to use internet without complexity and with security.

You will need to have basic understanding of:

1. Linux commands 2. Tor (read docs or videos on how to install it) 3. Systemctl, SSH and config files of linux

good luck