Try listening to ONF! They had a comeback recently and the boys are really talented
Their recent title tracks have been a bit dark, so listen to their b-sides or previous title tracks if you don't like dark concepts
They only have 4 title tracks so far: On/Off, Complete, We Must Love, and Why
For b-sides, I'd recommend Cats Waltz, If We Dream, Fly Me To The Moon, Incomplete (one of my favorites), Yayaya, Happily Never After, Moscow Moscow, and Asteroid
I know it's a lot to take in if you're new, but please give them a chance
I've read some really good recommendations here so far!!!
I would like to add ATEEZ to the list! They debuted last year and released 3 mini albums and 1 full album already! They are really talented and hard working (well I guess all groups are) and I hope you enjoy their music as well!
you could also check out compilation videos on youtube to quickly get a taste of a bunch of songs/artists so you can pick out the ones that catch your interest, which is what i did why i started really getting into kpop properly.