why dont you start your own private foundation?
you can name it after yourself
you can choose to either fund charitable organizations
or fund your own direct charities.
heres some reading material:
key is they are required to donate 5% of assets per year no matter what. any upside can be kept by the charity.
personally i think its better to give a stream of income as oppose to giving htem everything in full because
charities will spend it all right away to help as many people right now. but imo it is more wasteful, and it is probably better to keep their resources limited, while you compound the excess.
not to mention that if you keep it in a foundation, you will have a lasting legacy.
personally, if i had to choose what cause to help, i would focus on these needs:
food. this will stop people from becoming desperate enough to commit crimes.
shower. this will make them more approachable to everyone. with this alone this should get you a minimum wage job.
education, this will have the highest benefit to society as they will be more productive in life. but imo this is useless, if you cant fix the first 2.
for education, you would have to be selective. lots of needy people usually have a mental issue or an addiction, no point in investing in people that will yield low results.