Graphic designer

I need a design for the front and back of a shirt/ hoodie for Sigma Phi Epsilon fraternity. You can look up the flag, etc to get some ideas. Definitely something simple, sleek, and clean for the front with the Greek letters in the top right section of the shirt/hoodie. For the back, would love to focus on something cool and creative, maybe having to do with the sig ep national flag / logo etc. these designs are manly going to go on black, grey, and white shirts/hoodies, so keep that in mind while mocking up these designs. It’s not the hardest project, but I am thinking about expanding to other Greek life, such as sororities like Tri Delta and Kappa Delta.