Any advice on how I go about finding distribution platforms for my first short doc series ?

I have a 25 min rough cut edit of a short documentary series, and I have an funding source who's willing to invest as long as I can convince him the documentary film 25-min series of shorts will have great exposure.

Other than speaking to some relevant charities, and doing a lot of painful googling, I have no idea where to go with this, so any advice would be awesome! My aim is to get it seen by as many people as possible, rather than to make the money back (which would be amazing)

FYI Trailer here florentia.co.uk/documentary-photography-...