Well done you for going out and giving it a go. It's nowhere near as easy as it looks as I think you've found. As the others have said, it needs to be more than just pictures of people doing something, and the picture needs to tell a story in some way or have a clever or funny composition within them or just carry a lot of interest within the subject.
As a guide, you could take 100 street photographs and only achieve the above with 5 or 10, so don't be disheartened by what you have done so far and keep trying