First of all, you have to master an instrument or sing well.
The next step is to find a school. When looking for a school, don’t just look at the school’s official website, because a lot of the information on the official website is misleading and not very authentic.
You can check other people’s evaluations of the school online, or ask informed friends around you.
PS: 1. In fact, many specialty classes can be entered without specialties, as long as you have other ways or methods.
2. Music is a difficult road to pursue. It’s great to be a hobby, but if you want to go professional, both investment and competition will be huge.
(I also study music, the above personal opinions are for reference only)