Question 1. Character reformation and attitude change is a personal goal if you ask me people their are many people with bad characters who knows how to cover it up on the public or in private, so if you can be honest with yourself and assess your attitude and it needs some reformation then you can work on it. So to me it means changing your negative character into something positive.
Question 2. This is also personal so we have different life's and change to one person may not be same with the other, but so long as you are doing something positive then you are on the right path.
Question 3. Character reformation would impact Nigeria in a great way and it would lead to a better country in the long run.
Unless this country were to resort to the style of the North Korean government, wherebeit the citizens have in many cases been restricted from outside influence such as TV shows, online social apps, dress code and other things just to make them conform to the standard of rule and control by the government, then I don't see how character reformation is a one man job or just an individual problem to begin with.
Yes, it boils down to the individual who wants to be reformed to accept the new changes and learn to live accordingly.
It may also require the effort of the government agencies or other more concerned parties to be of good examples and with great attitude inorder for the character reformation in an individual to take hold and bear a positive result which is clearly visible with a new approach to life and other activities.