USB or XLR
A USB microphone connects directly to a computer and needs nothing else. An XLR microphone needs an audio interface or mixer but gives more control and room to grow. For a first show, USB is simpler; for a regular multi-person setup, XLR is more flexible.
Dynamic or condenser
Dynamic microphones are less sensitive, so they pick up less of the room. They suit untreated rooms. Condenser microphones capture more detail but also more echo and noise, so they work best in a quiet, soft room.
Pickup pattern
Most podcast microphones use a cardioid pattern, which hears what is in front and rejects the sides and rear. Some offer other patterns for interviews with a table microphone, but a single-speaker pattern is easiest.
Position matters more than model
Keep the microphone about a hand’s width from your mouth, slightly to one side to avoid breath. Keep the distance fixed. A boom arm helps. A pop filter reduces hard sounds.
Test before you commit
Record thirty seconds in the room where you will work, then listen on headphones. If you hear echo, move closer, add soft surfaces or switch to a dynamic microphone.