Are you checking websites of the schools you are interested in? Some schools post info and photos on the facilities.
How much experience do you have in percussion? Have you studied privately? Maybe you should be discussing these questions with your private teacher and have them help guide you toward a school that will fit you.
As for lesson syllabus, many don’t follow a strict syllabus. My own son’s teacher individualizes everything for his students. Everyone is different with different strengths and weaknesses and you need to address those.
As for perspective teachers yelling at you, you should have either hung up the phone or walked away. That wasn’t the place or the person for you.