The nonprofessional videos are where we get all our really good practice, where it's safe to screw up and we get to grin about it afterwards and fix things. If you never have an opportunity to screw up, you never have the opportunity to get better.
Besides, Hades knows that I have put together enough "professional looking" production booths with stuff I found around a kitchen and living room, using a cell phone is the main camera, to know that you can do some amazing things when you get motivated. Hang some cheesecloth on the side where you need some diffusion, or tape it to the lamp/light. Get a piece of white poster board and prop it up off camera to the other side, so that the light splashes off of that and back onto your face indirectly, which will soften the transition along with the cheesecloth.
And depending on what you're using to shoot, we might actually have an editing tool that will work just well enough so that you can crop in a little bit if you feel like it needs it, etc.
I love working in "make do" scenarios. It's frustrating as Hell, but the results can be ridiculously fun.
Your audio was surprisingly good, and that's usually one of the first things that I jump on when it comes to video production. It was way better, if not light-years better, than some of the audio that I've heard going on Kickstarter in the last month. So that part seems pretty well nailed.
(Let's not even talk about the "temporary fixes" in my studio that somehow keep hanging on for years because they're cheap and they work. I'm rather fond of the PVC tube backdrop hanger, though.)