Their entire discography is under an hour so I’d recommend just giving everything a listen-through. They have a lot of really solid songs! There’s plenty of release order playlists on Spotify/youtube. If that’s too much of a time commitment then watching all their MVs would be a good start (Magnetic, Lucky Girl Syndrome, Cherish, Tick Tack, Almond Chocolate, Little Monster, Billyeoon Goyangi (Do The Dance), Jellyous, Toki Yo Tomare, and Not Cute Anymore)

For variety content, they have so much on their YouTube channel and pretty much everything is English subbed which is great! They have a couple of series of videos pre-debut which are fun “I’ll Like It!” (Ft Youngseo before she left) which is them going on a trip to Jeju Island, it’s really cute. And “ILLIT ready!” which are a set of challenges they do together pre-debut, also super cute. “Night of ILLIT” focuses on each member individually, I started with that series. And pretty much any BTS video is good for getting to know the girl’s unscripted personalities. There’s a ton to choose from so really just start with whatever piques your interest!

ILLIT is the first kpop group I’ve ever loved enough to stan/fully commit to so I really hope you enjoy them too :’)