Perform sounds weird because key layout?

[SleepyMoony]

Hi! I just unlocked Bard because I thought that playing music in game would be fun. I don't have any experience with music before. I've been practicing my scales and today I decided to try a song. But when I played it it kinda sounded wonky, and I realized that was because the keys are layed out C-C1 and not A-G. Is C-C1 a common way to look at a keyboard slice and I'm just doing it wrong? Is there a way for me to make the layout A-G?

To illustrate my problem here is a video of me (very poorly) playing Twinkle Twinkle Little Star. It just doesn't sound right!
https://www.youtube.com/watch?v=GsXp...ature=youtu.be