They are far from it! Use Parrot https://www.parrotsec.org/ if you can download it. I can't over Tor. There are ways to install in Whonix gw but it breaks some of the security. i2p Whonix ws over Tor is a classic but you may get banned from some nodes and peers if you do not use hidden mode and ipv ...

This works for Debian 8 and you can alocate an amount of RAM up to 128k for it.

sudo dpkg-reconfigure i2p

User as i2psvc to start stop status

sudo systemctl start i2p
sudo systemctl stop i2p
sudo systemctl status i2p