First of all, Welcome! I'm genuinely glad you decided to join!
That said,
Swearing on Lemmy is actually mandatory and any posts found not containing any swearwords will be promptly removed and you will be permanently banned. These communities strive to reverse the damage done by algorithmically induced self censorship by requiring all participants to swear as much as possible.
Also, anyone censoring non swearwords like "dead" or "sex" that traditionally incur negative algorithmic interactions will also be sacked in addition to previously listed repercussions.
We're not without our cons though, biggest problem we have are probably the Tankies, but here they're mostly on the Tankie Triad lemmy.ml, lemmygrad and hexbear. For most instances you only have to worry about .ml, but on Lemmy you can do a personal instance wide block if you'd rather just not deal with them. If you want to see what they get up to from a safe distant check !meanwhileongrad@sh.itjust.works
Lemmy.cafe is an instance that blocks the entire Tankie Triad