Weapons require a great deal of responsibility. It is important to safeguard a weapon so that it is not stolen or used against you. Most importantly, a permit to carry does not authorize a person to use a weapon in most circumstances. The law is very precise about when such force is justified.
Guidance on that issue should be covered during your training. It is also important to note that even if use of a weapon is justified, it often may not be the wisest course of action, and may carry criminal and/or civil consequences.