What Kdrama do you recommend for a newbie?

Hi, so good someone made a community. I know nothing about Kdramas but I would like to watch some. What can you recommend?

I would like something cute and chill wit heart melting scenes. On the other end of the spectrum maybe some thriller with some fucked up plot? (thinking in terms of what I use to watch in Korean Movies, read OldBoy).

Thanks.

edit: I watched SquidGame.