I'm in the process of doing this right now (we're in the 'fake news' space). Google is your friend, there are a multitude of resources out there for nonprofits.

In terms of how to get going, here are a few useful links:

First, a feasibility study: http://help4nonprofits.com/NP_START_IsItFeasible_Art.htm

Next, a board: https://www.thebalance.com/importance-of-nonprofit-first-boa...