Since I had already played on tg for an bit I was experienced with the general basics of SS13, on my first CM round though, I woke up, explained to someone that this was my first op, and to just follow them, so I did, we deployed.
It was LV and we went south of nexus to engie, he got attacked be an xeno while I was standing there shooting at it with my M41A in semiauto, turns out no one explained to me that there was an burst fire mode, so in the end both my guide and me died.
Learned the ropes over an few days in the basic roles after that.