First paragraph, what corrections should I make?

In high school, I was not involved at all in school. I kept to myself usually focusing on my school and nothing else. It is something that I have grown to regret and believe it had hindered me from having the full high school experience. But once I cam to college I decided that I would not take the same route I did in college. In college, I became heavily involved in several clubs, one that is worth mentioning is called ABS (Association of Black Students). When I attended my first ABS meeting, my thoughts of the group were up in the air. I only attended the meeting simply because I had nothing else to do and wanted to follow the mantra “giving it the old college try”. The first meeting was interesting and memorable. One of the staff members came to speak. I expected a speech praising the group on their efforts and achievements last year. But it was anything but. The professor lambasted the group for their excessive spending on parts and their inability to help out unfortunate outside of campus. She then listed several problems that have plagued the black community, crime, drugs, ual transmitted diseases and listed statistics that proved her point. The information wasn’t surprising to me, but the fact that a professor would exclaim her grievances to the group without notifying the executive board, and with such vigor was what surprised me.