Hey Avi, I’m not a lawyer either, but the important thing here is the licence terms you got the music under. It’s from Pixabay, yeah? The Pixabay licence says you can use it for free, commercially or non-commercially, as-is or modified, as long as you’re not putting it on another stock-music website, selling it unmodified, or using it in a way that portrays someone negatively or implies any brand of theirs is associated with you. As long as you’re not doing that, you should be fine. (The question, as I understand it, was about making your own version of someone else’s music, possibly without their permission, which is not what you’ve done.)