First thing you have to do is demographic research, find out the need for it or if it's a viable option.
Second, look into the legislation you have to comply with
Third, Pick a legal format to register your business/charity as.
Fourth Get a board of Dirrectors for your Charity.
Fifth, fill out a Business plan and register your charity.
Sixth develop a training program for new staff.
Seventh Advertise your Charity
eighth, make sure you are incompliance with the law, with all the registrations, and permits etc. On all levels of government, municipal, provencial/state, and federal, and also international.
No one will support it if it appears to be a scam, or a source of financing for terrorism.