Unfortunately, I'm on a Mac, where I am unable to record my internal audio since QuickTime doesn't even support it. It can only record external audio. And I'm not the kind of person who would download alternate software just to be able to do it as they might not even be safe.
Just downloaded it. Was very easy to setup, no tutorials needed. I have it set to display capture instead of application capture, but I'll likely switch to that. If I somehow forget, I can always just crop to the application window in post editing.
I also found a bug with OBS. Apparently if you hide OBS from capture, the Stop Recording button will bug out and only capture 1 to 5 seconds of video, even though I was recording for like 40 seconds. unchecking "hide OBS from capture" fixed that issue.