How do I prove you need a water baptism?

I am a 14 year old catholic. I realized I really didn’t know my faith when I meet a. bible only boy who is my age. We have been debating on wheat her baptism is when you believe or a water baptism. How do I prove you need a water baptism

How do I prove to my friend you need a water baptism

These links should give you the answers that you need. If you have any further questions or concerns that are not answered by this, please contact Catholic Answers directly.
Recommended Reading:

*]Is baptism necessary for salvation?

DISCLAIMER: The views and opinions expressed in these forums do not necessarily reflect those of Catholic Answers. For official apologetics resources please visit