Great to have that kind of dream to motivate your practice.

One advice I could give you is to practice note for note with intonation in mind. Fix even the slightest intonation problems before moving on. Sometimes it's harder to concern yourself with intonation when you have been working on a piece of along period of time.

Practice with a recording if you have one for rhythmical accuracy.

Add as much expression as you can so that it is audible to the listener and not just to yourself.

Keep up the great work.