You have a lot of work ahead of you. All those designs are for little kids. Listen to what CK said.
Why did you chose Abandon clothing as your company name? What are you guys about? What type of style are you trying to achieve?
Personally I don't think you're off to a good start. But I will say that if I had to chose a shirt it might have to be the spartan or jet T. Don't give up tho, just keep at it.