The key to playing a good trumpet is... practice, practice, practice. The trumpet is a very challenging and demanding instrument. My teacher informed me that it would take a good 3 to 4 years to get a good solid tone from the trumpet.
I would recommend:
1. Get a good teacher and/or mentor who has played at least 7 to 10 years. That person can show you somethings that you have never thought about.
2. Establish a routine practice schedule. The great ones practice everyday.
3. Learn Music Theory (scales, intervals, minor vs major, different modes of various keys)
4. Long Tones. They help build your chops.
5. Buzz your mouth piece on the way to work, school, church. You would be surprised how that helps.
6. Last but not least, dedicate your talent to God and ask Him to bless it.