Answer: Look for better options
I was once like you, i wanted to be a k-pop idol
but I never actually auditioned and i'm glad
The industry has a set idea of beauty which is skinny
the training is also very harsh even though some companies are less strict about it
however if you feel that k-pop is truly your passion talk to your parents and offer a backup plan
something like "Hey mom and dad I truly want to become an idol, I need your support in this. I don't want to go against you in any way but I truly love singing and dancing and want to do this for the rest of my life but I know everything comes to an end so I promise to go to university to get -insert degree- as my backup plan"