I started my preparations in November 2018 to apply on January 19. This was a mistake as I started my preparations way too late for that. I should have started the preparations at least by June 2018. So the first advice I would like to give is to start your preparation on time. Give yourself enough time to be ready for the tests and application process.
Another piece of advice I would like to pass on is to open up your perspective. Originally, I had other plans and programs for life after my bachelor's. However, during the course of a conversation with Dr. Hubert Silly, I realized that I had a great interest in working in finance and investment banking. As such, I had to find a program to fit my interests. What I want to convey is that each of us must try to find out what we want to do in life and work out a plan accordingly. Families might be a good place to start a conversation if you are confused about your choices in life. However, talking to a professional like MBA Center would be a better option as they have the experience and expertise and understand the system better which will help you a lot when the time comes to choose the right program for you.