Greetings Kikobero,
Thank you for sending over your questions to the Community ToolBox and there is much information you seek. In reviewing your questions, I wonder if it would be far simpler to approach them one by one.
1. Describe the people who could potentially help address the problem or goal, the assets they could contribute, and how they will be engaged in the project. There is no direct answer for you; however, I believe you want to think about who will be your target audience in designing your sports and recreational program and who will you need to rely on to help you develop this program. Will there be local organizations that currently sponsor or provide similar activities or those who may have access to a certain population? While I do not want to answer a question with another question, you will need to be clear about the organizations or individuals in your community of interest you will need to work with or access to develop and offer the sports and recreational program. 2. Describe material resources (e.g., money, equipment) which could potentially help address the problem or goal, the assets that could be contributed, and how they will be used. Not sure if I can provide you with an answer here without knowing all the details about your project. However, you should identify what types of resources you will need to develop and offer the sports and recreational program. 3. Identify the key stakeholders (those who have something to gain or lose by the efforts to address the problem or goal) and how they will be involved in the project. See my previous note. You should be able to identify who will be your target group, who will you seek to serve through the sports and recreational program, then other groups who may benefit from such programming. You want to think through this using some of the tools on the Community ToolBox (Chapter 14: Applying for Grants /en/applying-for-grants/examples). You will be able to access some examples of grants that identify their target groups.
I believe the questions you pose will require you to really think about your target group, why such programming could reduce racial and cultural segregation, etc. In just thinking about your questions, I think you primary argument is "when individuals come together to achieve a common goal through sports then the racial and cultural differences are removed"