Ah, but here are my problems:
1. Since the video contains a lot of miscellaneous footage of me walking into the frame and putting on my headphones, then punching the music track into my headphones, then starting to play along with the music, I need to cut out all the prelim and post recording video, and then somehow align the separate mp3 audio with my recorded A/V. This has proven too difficult, and I'm sure there's a way to do it clearly and accurately.
2. I need to adjust the individual audio track volumes and EQs so that the balance is acceptable. Not sure how to adjust them individually within the mix.
It would be a lot easier to just record the mp3 audio at the same time as the camera audio, but I don't think I have the cables and monitoring capability I would need to do that. Nor have I figured out yet how to use VideoPad to actually capture the video and monitor everything on my computer screen with headphones. I guess I'm a little too far down the learning curve for what I'm hoping to do. If this weren't a pandemic, I would gladly hire someone to come here and teach me in person. But, your patient instructions are helping a lot. I do appreciate it.