If it gives you any confidence... when I installed ListMail I was completely new to setting up anything on a server. It did take me a bit longer than maybe it should have, especially finding out what CRON is, but by following the instructions given it worked out pretty straightforward and in hindsight seemed to be easy.
I expected problems with the BOUNCE settings but they went a treat.
Only problem I had was ensuring that the send from email address was one that existed on my domain for authentication. :)