Simply test all of the options and you can decide which one is the best idea.

I'm using a Blue Yeti as well, Good mic to be honest. Anyways, uhh. I have the pop filter about 3-4 cm from the mic and am about 10 cm from the pop filter myself when I speak to it. So far it's been going well.

Honestly, I have the pop filter right against the mic and I have my face right on the pop filter when I commentate and I have no problems.

Let me put it this way:

Shorter distance = Clear voice, less noise, less excessive audio
Closer you are the microphone it will pick your sound better, you'll become louder the closer you are.
When you are close and speaking to microphone you can drop the volume so only your voice remains at listenable levels, but everything else that microphone could pick, such as keyboard or table. Will be considerably quieter thus you get rid of all the excessive noises you dont want the microphone to pick up for who ever is listening you.

Longer distance = More noise and excessive audio
The further away from the mic you are, you are more and more quiet, this means you have to increase the volume so you can be heared. But it also means that all the crap gets also picked up by the microphone.

My audio equipment should arrive tomorrow and i'm going to make unboxing out of them. While at it I might aswell make a video showing how the distance affects the microphone etc.

Id honestly say invest in a microphone-boom stand (like one a DJ would have) so that way you can sit comfortably and have the mic right in front of your mouth as you're commentating.

Something like this:

amazon.com/Image%C2%AE-Broadca…rds=microphone+boom+stand

amazon.com/Stage-Rocker-Powere…rds=microphone+boom+stand

I dont know much either but put your mouth beside your mic, not in front of it directly or you'll get a P noisewhen you speak your words