Can someone give me some feedback on my audio in my videos?

I Just got a good enough PC to become a content creator on YouTube and Stream on Twitch. So since I'm just starting out and could use all and any feedback possible, my first improvement I feel needs to be my audio quality. I can hear the static in my headphones when I watch two of my videos but it won't let me render audio in Premier Pro 2015. Anyone know if Sony Vegas is better for editing? Or did I just do something wrong in Premier? Again thanks for feedback ahead of time, I will be responding to all the comments that I can!

P.S. There's a bit of foul language in some of my videos. So if you think it's inappropriate please let me know!