Hey i like your speed art! I own the TimberMC server. When i comes out, i will have donations for the server:
Wizard
Junior
Master
Veteran
Legend
If you make a profile picture to me on PlanetMinecraft you get a free Junior rank
Please send a mail to thetimbermc@gmail.com

-Netifo!

It looks good, although it could probably be better if you used different backgrounds besides pre-made ones like that. For example

I used some color corrections and other effects to make this banner have a somewhat clean look to it. I did not add too many effects so that it would not over do it and look like I just spammed flares and other effects onto the banner. Also using a landscape background makes it seem professional and original, as using backgrounds that are drawn or have characters already in them can sometimes make it look less professional. In all just keep practicing and don't be afraid to try some new styles!
Let me know if you want some tips or help.