How do I get people to perform my music?

as a "classical" composer?

competitions. friends. yourself. There is no way you can convince an entire orchestra to perform it unless you're established. But you could enter a competition. if you get past the first assessments, you might be able to get your pieces performed.

Do you go to a music school? If so you can ask people to play your music in composer's forums and recitals.

Make an advertisement and write down.

'I will give you 10$ to someone wants to play my song'