I help out with a positive news podcast at my high school and we're looking to interview people that have made a positive impact! We've currently interviewed people like Austen Allred and TurboVote.
You can find the podcast here, https://anchor.fm/somethinggoodhappened
Please give interview suggestions!
He has open, free video lectures that cover an entire 4 year cirruculum of a physics degree in his personal website called Theoritical Minimum.