Reddit mentions of ammoon Digital 4-Channel Mic Line Audio Mixer Mixing Console 2-band EQ with 48V Phantom Power USB Interface for Recording DJ Stage Karaoke Music Appreciation

I’d recommend using XLR microphones and a USB audio interface. I have the Scarlet 2i2, but you’d need one with four channels ideally. Four would give you one extra channel if you wanted to be able to record someone else, like an interview over the phone. Something like this [audio interface / mixer should work](ammoon Digital Bluetooth 4-Channel Mic Line Audio Mixer Mixing Console 2-band EQ with 48V Phantom Power USB Interface for Recording DJ Stage Karaoke Music Appreciation https://www.amazon.com/dp/B01IP8ZCW4/). For microphones, I recommend the [MXL 770 Cardoid Condenser Microphone.](MXL 770 Cardioid Condenser Microphone https://www.amazon.com/dp/B0007NQH98/) I’ve used a dozen different mics ranging from cheap USB mics to $300 Audio-Technicas and this $70 mic is very good for the price. Low noise, good pattern, sounds great for vocals.

You can use free software like Audacity or if you happen to have Adobe Creative Suite, Audition works really well. It’s what I’m currently using.

This setup would run you around $300 unless you found a cheaper USB interface/mixer... but this would give you pretty professional sounding results.

You could try to use USB microphones, but using more than one at a time is a bit of a hassle and depending on your computer, you may end up having issues with quality.