In all honesty becoming a K-Pop idol isnt as complicated as you might think. Jaemin NCT Dream LMyungsoo Infinite Juyeon The Boyz Wonwoo Seventeen Park SeungjunPark Seoham KNK Cha Eunwoo ASTRO Minhyuk Monsta X JRKim Jonghyun NUEST Ong Sungwoo Wanna One Kai EXO Mark GOT7 Kim Taehyung BTS Jung Daehyun BAP TOP Big Bang Minhyuk BTOB Lee Sejin 14U. BTS 방탄소년단 IDOL Feat.
Some of the biggest hits of K-pop include the Gangnam style Mic Drop Kill This Love etc.
Each with its own personality group and some with how you probably started.