Well that was fun. Bought Post Scriptum on Steam and had a poke around.
Joined a server with no other players. Adjusted my settings, did some exploring.
Switched sides to the SS to try that out. Then about 6 players joined each side.
I ended up following my bunch of experienced squad members around, who taught me a lot on the fly.
All of them sounded like middle aged blokes - no angry kids.
I was a tank hunter infantryman, with various goodies including a Faust.
I ended up destroying two enemy tanks by sneaking up behind them and planting magnetic anti-tank mines!
Plant...and then RUN! The explosion was big, and the ammunition cooked off.