I want to help make musescore better, but I don't know how to use git.
I, not sure what I was doing, cloned the repo. Then I started editing the file I wanted to edit on my hard drive, but I didn't create a new branch first. I tried making a commit... Now I don't know where in the process I am, or what I need to do to give my contribution to musescore.
Comments
Have you read the Git Workflow page by now? See http://musescore.org/en/developers-handbook/git-workflow if not.
From what you describe, I suspect you are best off just deleting everything and starting over following that workflow. If you've already made some edits to files, maybe just save those in another folder than copy them back to your working folder after you've created your branch on your clone of your fork.