We can't really help you with this, but consider the different podcast formats that exist: short documentary, radio drama, conversations between hosts, interviews, monologues, live events and more. There are a lot of directions your podcast can take.
Some of you might have professional microphones, but if you don't, fear not, you almost certainly own or know someone who owns a smartphone. Some earphones come with microphones that can be used as well.
Using an audio recording app will make your life a lot easier. You'll be able to watch and adjust your levels and manage your files. There are few free ones available.
Here are three options: Tascam PCM Recorder MK2, the Voice Record Pro and the Hidenburg Field Recorder Lite. Note that these are free versions and have limitations. The Hindenburg app won't let you record clips longer than 1 minute for example
You might already have one. For those who don't, Hindenburg Systems is providing licenses to every participant for a 3-month trial of their editor! So there's not need to go out and buy anything right now.
You'll find numerous guides and tutorials for the editing software on the Hindenburg Systems website. Editing is like making a layered cake. On one layer, you can have your voice and on another that of another host for example. You can add music and audio cues to other layers as well. It's like putting together a 3D audio puzzle!
Perhaps you have a friend or family member who would be perfect for your podcast. They're an expert in bioengineering for example, or maybe they're a world-class chef and you want to interview them. Fear not, this is easily doable with Hindenburg and Skype! Whether you want to shoot the sh*t about a subject, do an interview or get a quote from someone, Hindenburg will help you do that. Here's the tutorial.
Hindenburg allows Windows and Apple users to record the audio coming directly from their computers. This can be really useful. You might find a short audio segment on YouTube that you'd like to use for example. This short Hindenburg tutorial shows you how.
These are fun. Use them to add richness to your podcast! One word of warning: finding the right free music for your podcast can be a torturous process. Be wary of the rabbit hole!
The world about your is full of interesting sounds. Or course, there are also people who have opinions, ideas and expertise. Don't shy away from connecting with them.*Please use waivers to get their permission or a recording of them agreeing that you have the right to use their interview in your podcast.