During my career I had very good teachers as Rudi Korp (ex-solo trumpet in Tönkunstler Orchestra Viena) and Martin Angerer (current solo trumpet in Bavarian Radio Symphony Orchestra).
I have investigating a lot in trumpet approaches, trying to figure out why something is difficult for me or why something is not working as it should. It is especially helpful when you know what is truly happening to you and which tool you should apply to solve or improve something. That's what we can work on in my lessons. It is super important that musical aspect is learned as well, so I can help you with phrasing, styles, pictures...
But always have in mind: what you imagine could be possible through the trumpet, you just need the enough technique and your creativity would spread around with a fantastic trumpet sound!