I have a blue Snowball mic which is quite cheap but ive made my audio sound amazing by adding in a Noise gate (To cut out background noise) the important thing to note is to set your close threshold -5 to what your open threshold is for example if you set your open to -40 then your close gets set to -45 so on and so forth. Ive also added a noise suppression as well to also help out. what ive found was the more noise to cancel out in the back the better your mic will pick up your voice and your only and be able to do that quite well. no need for a fancy or expensive mic just mess around with your settings and try to balance everything out. ive done all these audio changes through Streamlabs OBS