The answers you seek can usually be found in the practice room. The only bad question is the one that is never asked. The spirit of curiosity and inquiry is allways welcome. Results usually come when you give up wanting the result. The body usually develops at a slower rate than the mind.
Expectation can be a block to progress.
The student should make a genuine effort to rise to the demands of the music. The role of the teacher is to clear up misconceptions. There are no short cuts to good trumpet playing. Do not make the assumption the teacher should provide the shortest, easiest way to do things. Along with private study goes the assumption that there is consistant practice on the part of the student as well as the sacrifices that are necessary to acheive that on a regular basis.