Other than stating the required scores to receive an application, no one on this board is qualified to tell you that your scores are or are not competitive.
As numerous people on this board have said, do the best you can do.
Also, you don't need to have a lot of leadership activities, ECAs, or sports -- quality is more of a factor than quantity and there is not really a "sliding scale" that makes up for ACT/SAT scores and the Whole Person Concept. Stick with something that you like, try to obtain a leadership position and make a difference. Sometimes, it is unique qualities that an admissions board is looking for.
Best of luck.