The good thing about painting a piece like this is that you can just remove the paint, or paint over the paint you don't like. It's not superfine like a tiny action figure, or super fragile. Don't be too afraid to work on it, if you are concerned about damaging it try working on an inconspicuous place first (is there an inside, for example?). Go in with confidence and don't let your inexperience hold you back, how else are you going to get experienced after all?