A podcast is a great way to develop a relationship with "hard to reach" people. You just need one person to listen. Get your message and pass it on to someone else, and you've doubled your audience.
1
What is the podcast about? Who do you want to reach? What message(s) do you want to communicate?
2
Solo or with guests? If with guests, are they local or remote? What "mood" do you want for the show?
3
Less than 20 minutes or longer? Hyperlocal or local audience? Or national and international audience?
4
And then the details: artwork, editing and post-processing, distribution, social media, linked to your website