How do you manage a 501 organization?
You need a fundraising plan and should have a professional fundraiser on staff to guide you and carry out the plan or retain a fundraising consultant. You need a board of directors who can decide important things like the direction and scope of the mission. You need a bookkeeper and someone to manage finances as you will need financial reports as well. A CEO is important but not immediately as long as the board can make decisions well. Your board members are volunteers and you can pick them by the skills you need.