The entire exercise should take between 10 to 15 minutes. Play some arpeggios. Start at C and move through the keys 1-3-5-8. Again, work your way up the scales.
How long does it take to sound good on trumpet?
You can learn to play a basic on a trumpet in a few months if you practice daily, but with bi-weekly practice, it takes 1-2 years to master the trumpet. You need to build up muscles and get familiar with the mouthpiece (embouchure).