The first and most important thing which you need to do is that you need to go ahead and take into consideration the colors of the school and the logo that the school has. Both of these are already going to exist and will be rather important to create an overall message. The key is to use these color schemes and logos that the school has, and then merge them with the uniform. You can either opt to use all the colors that represent your school, or just use the primary color which gives the school the identity.
As far as logos go, you can go ahead and use them on the drum kit, as opposed to having them on the clothes directly. This will make them look even better.
Now once you have gone on to decide on the color scheme for your uniforms, you need to take the first step and decide on just what kinds of uniforms it is that you want to make. You need to carefully follow the dress codes of the school and institute. If you have a uniform that is pre-assigned to everyone on campus, then try and get a uniform that matches that. However, if you don't then you can go on and use your imagination and pick just about anything.
Ideally, you should go on and pick something that wouldn't look bad on men or women. However, if you have surplus cash to spend, then feel free to get just about anything that you want.