From my experience prop firm isn't meant for newbie or inexperienced traders, Prop firm sole purpose is to help traders who don't have acquired the knowledge or gained the experience to trade profitably but don't have funds to trade and here prop firms come in to solving this problem for this set of traders, however they don't see any trader and fund them, you have passed through their test process to ascertain you can trade profitably before you get funded by any existing legit prop firm.