welder flux to mig???

I recommend you find a vocational school or community college that offers welding classes,knowledge is power,At least for the basics.I've had to grind out a lotta bad weld's redoing other peoples mistakes.You want to be safe,nothing worse than your car coming apart.If you can't convert your present machine to shielding gas,take it back and get one that will.flux core makes a highly contaminated weld,not good for body work.Good Luck