Math & Actuarial Sciences/ Educational goals,interests in chosen program

At school, I was nebulous about which subject I liked the most. Perhaps the only thing I knew was to excel in everything to stand amongst the top 3 students in the assessments. It was fine then as it helped me listen to people chanting my name for good grades I achieved. I only realized in High School when studies became complex how great it feels to do something you enjoy. I started loving Mathematics and decided to pursue a career that revolves around it. Considering my passion for social sciences and public speaking and aptitude in Mathematics, Actuarial Sciences became an ideal option. I wish to become an Actuary. Acquiring Actuarial sciences-majors from University of Waterloo; acclaimed as Center of Actuarial Excellence by the Society of Actuaries will be a certain boost to my career. Furthermore, it's a place where ideas that connect, sustain, transform and succeed start.

"At school, I was nebulous about which subject I liked the most."

I like the word "nebulous", just not right here. Keeping it simple with "indecisive" or "indifferent" depending on what you mean to say.

I agree the word doesn't seem to fit with the rest. Other wise it seem s good to me.
good luck