Might want to just try a high quality conference speakerphone. They have advanced audio processing, directional microphones, noise cancellation, etc. built in - since they are designed for this kind of audio from the ground up.
You can find the Konftel Ego for $80 at Provantage.com (around $120 everywhere else). Konftel makes amazing speakerphones that rival polycomm, for a lot less. Indeed, I actually prefer their sound to polycomm.
The Ego will be a dramatic upgrade from whatever is built into your other gear. If you still aren't happy with it, then you can start going down the USB/XLR microphone rathole if you still prefer. But it's probably unnecessary.
There are a ton of guides online, especially since the pandemic started. Getting a USB microphone is so easy and cheap that you probably don't need a guide for it. The guides that I've seen for USB mics are generally focused on the features that streamers need, which are somewhat unique (they want to capture desktop audio at the same time).
If you are going for the prosumer option, I recommend Scarlett Solo + Shure SM58 + XLR cable + mic stand. This may be a bit overkill for meetings, but it's a good starting point if you want to record music, stream, record a podcast, etc.
I will note I've had a bunch of issues with the Blue microphone USB output hanging when I reboot my PC with it plugged in: it still registers, but won't pickup audio - a quick replug fixes it, but it's incredibly annoying.
If I were modifying my setup today, I would've gone with an XLR mic out the gate: at the end of the day I ended up running analog audio to the Blue microphone anyway because the value of having monitor audio to your headphones is incredible (and you do not want any latency on that at all).
You can find the Konftel Ego for $80 at Provantage.com (around $120 everywhere else). Konftel makes amazing speakerphones that rival polycomm, for a lot less. Indeed, I actually prefer their sound to polycomm.
The Ego will be a dramatic upgrade from whatever is built into your other gear. If you still aren't happy with it, then you can start going down the USB/XLR microphone rathole if you still prefer. But it's probably unnecessary.