It's been a relatively isolated community for a long time which has resulted in lots of obscure bits and injokes proliferating, but as long as you engage in good faith and show openness to learn from sources that might contradict your presuppositions based on the sea of propaganda we are all born into you'll get along just fine.

Also half the time I don't know wtf some of these folks are talking about and I am also definitely on the older end of the lemmy demographic.