I'll be able to go back in and fix the sound now
You can't repair the Charlie Brown, talking into a wine glass sound you already made.
I said the microphone is designed for voice. That's not technically true. The microphone is just a microphone but it's plugged into computer processing
that is designed for voice.
any equipment I can purchase
You would think I should be able to just whip out a recommendation, but it's just not that easy. I think my first pass would be to see how good you can make your computer microphone. You can do that for free; it's just your time and effort.
Then if that proves to not work very well, we can work up. I have recorded voice tracks and other work on the computer microphone, but I have a Mac. So that gives you the first idea of how slippery this is.