Other styles may have added advantages depending on your size and weight. If you have knowledge of any of the formal fighting styles, you will automatically use them-boxers punch, karate experts kick, judo experts use throws. Use whatever comes naturally and develop it. Use you natural advantages. Short stocky people are good at grappling as they have a lower center of gravity.
Tall people have a longer reach.
Shorter people may be able to get inside the reach of taller people and butt with the head. Most techniques can be tailored to suit your size, age, build and weight. It would be easy to develop a false sense of security-discovering, when it's too late, that you really haven't learned anything. Courses should be taken seriously, and followed through. Real confidence and real ability to defend yourself are worth achieving.