Many people go through this, heck my family would disown me if they could just because I dye my hair and I want tattoos. Point is, I do what I love, you do what you love whether people judge us or not.
In life, everyone is going to judge you, whether it's good judgement or bad judgement. Thing we could do about it is, use it to better ourselves in a good way or just completely ignore it.
If your mom doesn't understand that this is what makes you happy, just completely ignore what she has to say.
Don't give up on yourself sweety, those K-Dramas need to be watched, don't they? ;)