doing really good for 15 months!
looks like you have some nice gear too.
My suggestions for improvement are:
1.every time you practice move the mp a little further into your mouth.looks like it’s too close to the tip. more in your mouth will mean a bigger sound.
2.tap your foot with the music. focus on the 2nd and 4th beat (that’s the snare drum) because you are racing ahead of the band.
otherwise sound very nice!