It sounds to me like you are already well on your way, so my advice to you would be to continue working on what you are working on, but to also be honest with yourself about how each aspect that you listed is shaping up. My thought at the moment is that no matter what you know intellectually, if you can't do it technically it's almost of no consequence. If there is anything in your technique, whether it's articulation, flexibilities, sound quality, etc, that is not up to the same level as the other, make a point to work on that specifically and give it extra focused attention. If you can play Arban's Carnival of Venice and make it sound decent, I'd say you are ahead of the curve of a lot of players. There are parts of that tune that I still don't play well and I've been a working trumpet player for a long time. Keep in mind, for about 98.5% of trumpet playing, you probablyt won't need that kind of virtuosic technique. Good luck with it and keep us posted.