Replying to NS i need your financial advice

Hey NS, so i really want to buy my own car. A wrx has been a reasonable dream of mine for a while, and i recently stumbled upon one that is well within my price range. I have a steady job, and in the summer i work two jobs. I am also a junior in high school, so i dont really need one (i have use of a third family car, but we will probably need a fourth assuming my sister comes home for the summer because we each work) but god damn i want one. is it a bad idea to pretty much clear out my bank account to put down a good down payment and get it road legal? i could easily make the monthly payments, i just would spend all my money ive earned