Find some charities that interest you then hit up a site like https://www.charitynavigator.org/ https://www.charitynavigator.org/ and see if they are in the dat

Find some charities that interest you then hit up a site like https://www.charitynavigator.org/ https://www.charitynavigator.org/ and see if they are in the database, if they are see how they are rated, make sure they aren't spending 95% of what they raise on salaries and advertising expenses, etc.