To start with, familiarise yourself with the organisations already working in this field. Make sure that the project you wish to initiate is not already being addressed by an existing organisation. If it falls within their scope but they haven't taken action yet, consider reaching out to them to offer your assistance in testing the concept and exploring the potential for scaling the initiative.
Here are some resources to gain a better understanding of the current state of the ecosystem. However, keep in mind that this is just a starting point. Successful founders should develop a comprehensive understanding not only of effective giving but also of the existing ecosystem of organisations operating in this space.
Overview of current gaps and opportunities for effective giving
Effective giving ecosystem overview
Charity Entrepreneurship has put a lot of thought into the practical aspects of launching a successful organisation. There is no better resource than Charity Entrepreneurship's How to Launch a High-Impact Nonprofit to help prospective founders understand what they need to know about starting a new initiative.
Once you have developed an understanding of effective giving, the network of organisations involved in this field, and how to successfully found a new initiative, you can express your interest to Giving What We Can. They are currently seeking founders for new effective giving initiatives. You can find more information here.
To ensure that you are on the right track and to receive support and connect with others in the space, it is important to meet with the Effective Giving Global Coordinator and Incubator. They will reach out once an expression of interest is submitted. The Effective Giving Global Coordinator and Incubator can: