You took on more then you can handle. Try and buy as much already prepared foods that you can. You alone can't do 400 get some help. And get them to give you the money to buy all the things needed first.
Sorry you cannot fry without some sort of fat lubricant. If you do, it is not frying. When you do chicken thighs you are rendering fat from within , therefore you are cooking in it.. To cook in a little water is called pouling