Here are my suggestions:
"I gained valuable knowledge in the ways of how human societies relate to each other and to the planet that have profound implications for the quality of life around the globe from my preceding experience. Success in my school studies and work experience in the financial industry with an unexpected economical market has given me a secure academic foundation with which to approach a degree in social ecology with confidence and enthusiasm. Besides, my current job has provided me a chance to work as a team player with others and at the same time be independent. Mostly (Remove comma) I have been able to work on my own, which I have enjoyed immensely as it has allowed me to use my own ideas and thoughts. This characteristic has enabled me to accomplish short-term and long-term goals and achievements apart from improving my communication and customer service skills.
In addition, I like socializing with my friends and meeting new people to learn from their experiences. To stay involved in the community and also participate in social activities (Remove comma) I became certified in Zumba (Latin Fusion Dance/Fitness). I consider having a balanced life (What? How/what do you consider a balanced life?); a person who enjoys a pleasurable night out (Remove semi colon) yet understands prioritization and the significance of education and employment. My best friend describes me as an opinionated, trustworthy, and a pleasant individual who has strong moral values. (I hope your best friend would describe you as such; do you have a less biased individual to whom you can obtain a more balanced recommendation?) I also consider myself an over-achiever and believe in my ability to accomplish my goals no matter how challenging the objectives are. My previous experiences have enabled me to be an independent, organized, and self-disciplined person which is a preparation for forthcoming student life at the university. I look forward to becoming a successful socio-ecologist in order to address issues involved in the relationship between human populations and their environment."