The Montana Non-Profit Association has a weath of information for all things non-profit. Specifically, check out their page on starting a non-profit.
In Missoula you will find the Non-profit network for peer support and access to non-profit expertise.
Both of these organizations have newsletters that list relevant current events for non-profits, non-profit job openings across the state and regionally, and non-profit conference and training opportunities. To get on these lists, email the respective organizations and ask to be added.
University of Montana students, alumni, faculty or staff the Blackstone Launchpad can assist with organizational development questions.
Starting a non profit: https://www.mtnonprofit.org/C3Startup/?hsCtaTracking=83267d97-70c8-48fd-a7ca-26a6869c0f0c%7Cbc253692-7bfa-4e71-9b87-39eb2cb36795