Aibu to save my treat money up for weeks and do it for real?
Yes. If you made 19K in a week, the odds are somewhere in the region of 50:50 that you could have lost 19K.
I suggest you read a few of these books before using real money.
"Market Wizards" and "New Market Wizards" by Jack Schwager. These are a series of interviews with mostly hedge fund managers, mostly from the late 80's and early 90's, but they will give you some idea of how difficult trading actually is.
"A Fool and His Money" by John Rothchild contains some amusing anecdotes on a similar theme. My favourite quote is from a Chicago commodities trader:-
When I first came down here I was Mr Big Ego. I had a law degree and here were all these ex-cops and truck drivers and people with 200-word vocabularies trading in the pits. I figured I'd make a killing, right? With this competition, how could you lose? Then I get the shit kicked out of me. Then I get the shit kicked out of me again. You know what I learned down here? Humility. Discipline. You come into this business with any sense of superiority, and you're dead. Sooner or later you find out who you are. That's what this game is about, finding out who you are. People say the market's this or the market's that, and they begin to think they can understand it. They discover they're wrong. They can't understand it. The market is ... the market is God
For a clue as to why people are clueless about their own level of incompetence, try "Fooled by Randomness" by Nicholas Taleb.
Lastly, for a mainstream book that explains why even investing (as opposed to the trading you are talking about) is so hard, try "A Random Walk Down Wall Street" by Burton Malkiel.