Like another heyurizen said, 6 months is nothing. It would take you 5 years of practicing 3 hours a day minimum to get to a stage where you could begin to consider pursuing a career in music, and even then it would depend on whether you're willing to dedicate yourself fully to it. Many people abandon at this stage because they want to have a life.
If it's really what you like the most, you should do it for pleasure, and not get hung up on being "stuck on children's level scores".