Keep up the good work! Practice every day, if only for five minutes.
In addition to playing your horn, when you can take time to practice rhythms by clapping, and to sing.
Maintain good posture whenever you play: feet on the floor, sit on the edge of your seat, have the edge of your bell on your leg
Work on the Shrek music, especially on the bars I have marked.
Start work on Also Sprach Zarathustra.