One of the biggest misconceptions about brass playing is that it's all about the chops. Well, it's definitely not. It's all about AIR.
Air. Air. Air.
Without air support, you won't be able to play your favorite song. Or play the way you want. Or sound the way you want. Please view the following.
First of all, every one of you should learn the name Arnold Jacobs. Important part of brass playing history.
Air in, air out. "Finger Breath"
"Remember the feeling"
Two instruments. Hear your instrument in your mind, then "mirror" it on your instrument.
Good day, and good practicing.