Hello Daemonlilith,
I joined a guild for this xpac that I am quite happy with at Tryhardish. There is a wide variety of experience levels that lead to a more casual atmosphere. But, the officer team is knowledgeable and skilled while being dedicated to forming a positive environment. Avg age is probably in the 30s with a ton of working adults that want to game.
We currently are looking for some heals or a second tank for the raid team. Although anyone is open for an invite for M+ or other activities. Raid schedule is at 10-12 est Thursday and Saturday.
If that sounds like it might be a good fit for you, I invite you to check them out. Cheers,