i'm confused ,who can tell me what should i do?

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it seems i have no realistic ideality,i like fashion,like reading fashion magazines,sometimes i imagine i was a fashion designer or a hair stylist.but in fact i know little thing about that.i'm 21 years old but i even don't know what should i do every day ,i don't study in my college,'cause i hate my major .i'm really scared and confused,i don't want to be poor in future.what should i choose to do?