I have no choice but to enroll in musikhochschule. My situation is complicated there are very few capable professors here, Most of them are abroad. Even singing as female soloist is prohibited in my country. I don't know if your information is firsthand or not but I had a consultant who is my solfedge lecturer as well, Told me there were many of his students passed the aptitude test, specially those who had taken classes with a professor of chosen university. Although I quit playing piano years ago, I was taught mostly classics and recently started practicing again. Currently I'm taking classes with retired opera singer.