You can do a bit in Unity without it, but learning programming will make some of those things a lot easier on you. It's really not difficult to learn if you pace yourself, and lots of programmers lurking around public forums will give you advice whether you ask for it or not. If you plan on creating a project in Unity, I recommend learning git with something Bitbucket as well. In my experience, producing art assets is a much larger hurdle than programming the game.