Gather information (survey) in Tanzania.

I am currently in the process of opening a business. The business itself is a soccer school for kids in Dar es Salaam, Tanzania. I need to gather information about the potential customers in Dar es salaam. Information such as the number of schools in the region, age group, male to female ratio, and any other statistics that you think is relevant to the business itself. A page or two will do in some sort of visual form.