hello, I plan to reinstall GhostBSD but I would like to know how to install software which is necessarily intended for BSD but often for linux debian or fedora such as Tor browser, bleachbit, Jami messenger P2P, freetube a youtube client, an image metadata cleaner and another pdf, a virtual machine to put Tails there from time to time, a free vpn and then also how to change the MAC addresses and its DNS. Thank you in advance for your precious help.

Tor Browser is not available yet.

Use search in Software Station in MATE for the following:
Tor
bleachbit
Jami messenger P2P
freetube a youtube client
a virtual machine to put Tails there from time to time
an image metadata cleaner
another pdf

For the 'Tor browser' try configuring your browser:
Firefox Proxy -> set 'manual' with socks host 127.0.0.1 on port 9050 using v5.
There's no proxy for localhost, 127.0.0.1

For a vpn try protonvpn
https://en.wikipedia.org/wiki/ProtonVPN

Configure your DNS and other network settings by using
# sudo bsdconfig networking
in a terminal.