It’s definitely possible with Blueprints, and it’s definitely impossible with no experience. But of course, experience is something you gain as you progress and invest time into it. So since Blueprints are not an issue, especially for something as trivial as rhythm game, and experience is gained with time, the only factor is time.
Generally, it’s very difficult to invest enough time to finish a game if you have it as a spare time project, not fulltime. If you have to work or study alongside working on your game, the rate at which you will gain experience will be very slow, and diminished by the fact you can’t fully focus just on that during a span of at least whole single day at a time. It’s not impossible, but it’s very difficult.
So it’s not as much about the tool, but rather about willingness to spend significant amount of time working on it, and probably neglecting other parts of your life in the process, and at the same time being able to maintain motivation to pull that through to the finish.
There’s one well known 3D artist named Beeple, who is known for his incredible work ethic, and in one of his talk, he shared the secret of effective time management:
(Skip to 39:30 time mark as the time mark link doesn’t work correctly here)
I think this perfectly applies to (successful) indie game development as well.