design a t-shirt

I am looking to design a t-shirt for a concert-themed wedding. The idea I have is a shot from behind of my fiance and I at the back of crowd of a concert holding hands. We and the stage are in focus, the rest of the crowd is not. I am uncertain of the style for the picture so are open to suggestions, but something you might find at a rock, punk, ska or reggae show is the general theme I'm hoping for.

For colors I'm thinking black or something dark. The size of the shirt design should be the front of the t-shirt. Please let me know if there are any questions.