>Is there a preferred torrent program?
I prefer webtorrent for video/audio, picotorrernt for everything else (windows)
>Is it possible that one of the torrent participants has a virus that can be downloaded?
Yes
>is it only the original file the could have a virus?
Same thing, so yes.
>So if I/we trust CM, I don’t need antivirus software?
Incorrect, unless you are uber leet texorz haxorz and have reasons
>Apple Mac still vulnerable, right?
Right
>Can anyone on the torrent thingy know who someone else is if it is installed correctly?
They can get your IP and track your personally from that, yes.
>Once all ready, how do I join CM’s torrent group?
>Total novice re BT.
You don't. If you do not know what you are doing then do not do it. Read CMs own warnings. It is getting clearer and clearer that CM is using torrent for censorship countering more than anything else, once what he is sharing comes out, tech anons will share some sort of version of it, stand down and stay safe anon.