Where to start as a hard money lender? Advice please

[Mary Joe]

I am trying to educate myself to see if I have what it takes to be a hard money lender.  When I searched online, all i see are ads offering hard money to house flippers.  

But for someone who wants to make some passive income via hard money lending, where do I go to search for house flippers who are looking for hard money for their flips?