i traded prop before.
the main thing i did not expect is no one taught me how to trade.
we were taught basics such as support/resistance, higher highs/lower lows, risk management, level 2 screen, ecn rebates, etc...
but nothing about what stocks to trade, how to identify if the stock is going up or down. or a system of when to enter and exit trades.
so basically no one will teach you how to trade... and a lot of people have no idea what they are doing.
also most people quit after a few months.
but if it is your dream you should go for it. the successful guys were making $1,000,000+ a year.
i'm still trying to be a trader but now i do it from home and just paper trading. when i can paper trade successfully i may go back to prop for leverage.