I'm in a semi similar predicament. I'm in a pre-academy police force right now. I spent about $400-500 on all the stuff I needed for it. But after passing algebra and realizing I kick ass at Geometry, I want to be an architect, my original idea of a job since I was in elementary. Now if I could afford to lose $4-500 to lose, then I'd quit. But my family is stuff poor, so I can't waste money. I'm trying to get a job somewhere so that I'm forced to quit because I work on the days of the meetings. and I know that if I quit my parents will be disappointed in me. My dad says I have to be in it at least 1 year before he will be okay with me leaving. He says I can do what I want, but I know that it pisses him off on the inside. Like for example, when I quit football, my dad didn't talk to me (excluding asking for favors or chores) for a week or so.
Bt enough about me. In your situation, I'd practice more.