Hey there! =)
I think our guild, Ministry of Silly Wipes could be worth a look!
We’re social/casual first and foremost, but do raids on the weekends, Guild mythics on a Thursday evening in a relaxed environment, and many others who like to try and run mythics throughout the week as well!
Have a look at the thread I linked, and if you’ve questions or are interested in joining, my contact info is at the bottom of the first post ^^