How do I explain why anyone should care about my product?

You can list what your product does, but features are not reasons to care. A feature is a fact. A reason to care is what that fact does for a real person's life. The gap you feel between describing and convincing is the gap between the thing and what the thing is for. To close it, stop at every feature and ask so what, until you reach something a person actually feels, less worry, more time, a problem gone. That final answer is your positioning. People do not buy the drill. They buy the hole, and really they buy the shelf and the tidy room the shelf makes possible. Speak to that. Take your strongest feature and follow it down with so what three times until you hit a real human outcome. Lead with that outcome, not the feature. Positioning is not clever words. It is simply caring enough to say why this matters to the person in front of you, in language they already use about their own life.