What issue are you having? You can join the coven in a few ways.Does anyone have a coven walkthrough, trying do that route somehow failing to do it
First chance you get is during the Titus hunt, when you get the option to help Rachel, instead go fight Barberry/Keera and ignore the lights.
You can also get Barberry attention by using cum addiction in Ward class.
Lastly you can go see Suzie on last Saturday during late afternoon as long as her trust is high enough. Doing the bunker should be enough but theres options during Barberry class to boost her trust too.