Maybe @iubaccounting can jump in on the accounting degree question. Seems to be knowledgeable about Kelly and I think is a current student there. I think you do want to know that for certain before making a decision.
You sound a lot like me. I was a bit of a goof off in high school, never opened a book, had very bad habits. Once I got to college I did change and did better in school because I was working towards something I wanted. However, to get into Kelly there is going to be a lot of hard work and habits don’t just change overnight. Despite working harder in college, I didn’t all the sudden become an A student.
My D is a way better student than I was. She is taking two ACP classes, basically W-131 and P-155 classes this year in her senior year of HS. So far she has a B+ and an A in the classes but she is realizing that college level classes are harder than her HS honors classes.
The only thing I would say is the level of effort you are going to have to put in to have a shot to get into Kelly is going to be a lot. If you are interested in Greek Life and other extra curricular activities, are you going to be able to do it?
Good luck in your decision. Not an easy one to make.