My first valve of my trumpet will not go all the way down, I can't take my mouthpiece out, and I can't blow high notes through my trumpet. If anyone knows what

Sound the Trumpet: Codicil-w/ADS - Sol-Ut Press

The Structure of the Trumpet:How does the trumpet generate sound? - Musical Instrument Guide - Yamaha Corporation

Why don't I polish or buff your valves? – Diefes Brass Repair

The Definitive Guide to Trumpet Mouthpieces- Reprinted from 2013 – Trumpet Blog

Trumpet Valve Tightness and Compression Issues (Reprinted from Feb. 7, 2013) – Trumpet Blog

Braces Killing Your Trumpet Playing?

Phil Norris Pro Trumpet Lessons

Could this be Louis Armstrong's Trumpet? Found in a Vegas estate of one of his friends/associates in 50s/60s, engraved L.A. on mouthpiece. Letter from him to owner but horn not mentioned—looking for

I'm confused. I never played the trumpet before. When I get my trumpet for the first time, do I have to tune it? If so, how? - Quora