Go somewhere like www.onlinetradingacademy and buy some class materials or take a class. If you have 50K why do the prop thing. I'd suggest a retail direct access firm and learing at your own pace.
Keep your 50K in the checking account. Develop a system that suits your trading style. No one can tell you what your style is. All we can do is make suggestions. Paper trade that system till your at least hitting 70% of all your trades. Then open an account and trade 100 share lots to get your feet wet. Eventually you can increase the size till you have a blow up day.
I think I would back away until I have a system in place that you can consistenly make money with and not blow my 50K.