I have a fancy mic that I keep close to my face, but you still pick up some noise in an untreated room, so some sort of noise gate is important. (I personally use Krisp, which works pretty well. You hate to use a subscription service for something that could be done in hardware, but it's a lot of months of $5/month before you break even, and software doesn't take up valuable desk space with knobs that you never turn.)

To me, built-in echo cancellation tuned for people that do video calls with speakers / laptop mic is the worst thing. It tends to mute your audio for the first few seconds of your "turn". That means if you are just saying "yeah" and nodding, an important component of how humans interact, you disrupt the meeting for 5 seconds instead of adding some social smoothness. Use headphones and turn that off, and everything is a lot better. (If you use Zoom with a good audio setup, you have to turn on "original audio" and then turn off echo cancelation, and make sure you aren't echoing.)

But yeah, with any sort of sampling task, you want to increase the signal to noise ratio. The best way to do that with a microphone is to have it close to your mouth. A $4000 microphone on your desk is going to sound worse than a $70 microphone close to your mouth. That's just physics. Building a microphone into your keyboard is basically the worst thing you can do.