Graduated HS in 2016, want to go to college Fall 2018, grades weren't the best?

Hi all. I was wondering if anyone could give me their thoughts/advice on my chances of getting into Mason Gross School of the Arts (Rutgers) and any other fine arts schools. I graduated high school in 2016 and took a year off (which turned into two) from school to focus acting at a studio near me, but now I’m ready to get back into education. I realized as I was filling out my application that my grades in high school weren’t the best due to personal problems (which I addressed in my personal statement as well as why I have a gap in my education history) and my SAT score, which I took late 2015, is mediocre at best. I scored 1710 in total. My weighted GPA, last I remember, was somewhere between 2.9-3.1. Rutgers doesn’t require a recommendation letter, but I found that a lot of the other universities I want to apply to (NYU Tisch, Ithaca, Boston, Purchase, The New School, California Institute of the Arts, Emerson, University of Texas at Austin) all do and I’m not sure how I can go about asking teachers who probably don’t even remember me to write a letter for me. So my questions are:

  1. What are my chances getting into Mason Gross? Grades weren’t the best, but I was involved in a lot of extracurricular activities, clubs, and volunteer work, had a leadership position junior year, and received many awards. I also have acting credits outside of school plays/musicals on my resume.

  2. What are my chances getting into any of the other schools I mentioned above?

  3. How should I ask old teachers for a recommendation letter when they’re so busy with students that are currently enrolled in their classes and probably don’t remember me?

Sorry for the long post. Thanks!