Here's the (not so well informed about this particular gear) recommendation that I would give my kid if he/she posed that question.
Use the kit lens for a while to gain some experience and find out what kind of limitations you find yourself running up against in your normal type of photography.

Each lens (including those made by the camera manufacturer) have their own strengths and weaknesses and can't be evaluated on just one aspect like max aperture. Although that is important, there may be other facters that make a faster lens a poorer choice. Find the individual tests and reviews for the lenses you are considering and use them to help you with your decision.