Ok, I'm going to be brutally honest with you because I think this is something I think you need to hear:
You are in complete denial. You're not listening to what anyone is saying. You can't be 38 years old and all of a sudden one day say "I want to be a trader." You don't know anything about finance, or trading, or how these firms work, so it's obvious that you are only chasing what you think is glory and money without actually knowing what trading or finance really is. Even if I were a technology recruiter at a bank, I would still be surprised at your lack of knowledge of the finance industry and how banks work. (Is this really where you want to go?) The more you talk, the more I question your motivations for wanting to go into trading. The people that want to become traders don't just talk. They move. They go and find out things on their own. They scrutinize the news everyday. (Do you?) They understand how news affects equities, fixed income, and other derivative asset classes. (Do you know the differences?) They actively trade their own money in the open market, (and no, your 5 stock IRA doesn't count). They demonstrate not only an interest in trading, but also an aptitude for it. I really don't know who put the idea in your head that you can be a prop trader, or a trader at all without knowing the first thing about trading. You seem to have an oversimplified view of it, and demonstrate neither the aptitude, the interest, the knowledge, nor the credentials--only a naive fandom of trading. You are a wannabe, and that's about it.
Besides getting extremely lucky, there is only one way I can see you trading, that that's if you open up a serious broker account and trade on your own. If do well enough on your own, then at least you'd have something to approach employers with. But right now, you have nothing. Even if you were 22, no one I know would hire you.
If this is seriously your dream and you want to work hard, don't talk so much and just prove it. The world of trading is cold and unforgiving.
If I were you, I would start here for equities:
http://www.marketwatch.com/game/
and here for forex and automated trading strategies:
http://www.metaquotes.net/
Open a demo account and play around with it a little bit. Others can recommend other ideas for getting started in trading.