Many people who want to be instructors when it comes to scuba diving need to make sure that they talk to an IDC staff instructor locally in their area. They are going to provide people with enough information to determine whether or not it is going to be a good fit for them.
It can sometimes be very difficult to figure out exactly whether or not a person wants to train others when it comes to scuba diving. It is a very difficult practice to completely understand, and sometimes people find it difficult to ever really get completely comfortable underwater.
Being comfortable underwater is perhaps the biggest thing when it comes to being a scuba diver in the first place. If a person never feels comfortable, they are never going to completely find a way to enjoy themselves when they are exploring.