It varies dramatically for different types of wine, even within the broad categories (red, white, rosé, etc.). Some wines are grapier and will be reminiscent of juice you've had. Others are further away from that. Invariably they will taste different if you've never had wine before, even moreso if you've not had alcohol.

If you are interested in wine for the experience, I'd recommend situations where it's well-paired with food. The best wine I've ever drank has been with good food that complemented it.