Hello again @Siku,
thank you for sharing your question with us.
As nursing is a so called bottleneck profession, you always stand a good chance to get a place in one of the schools. A change is possible under the new law. As soon as you get a contract from a school, you can apply for a visa according to § 16 a sentence 2 Residence Act. Triennial nursing schools start 1st of September. Your application for a visa according to § 16 is possible six month before the beginning of your training in school, not earlier (otherwise you would have to apply for the visa in your home country).
I hope my answers were useful for you and I'll be very pleased if you contact me again with further questions. I'm a member of the mbeon-staff and I‘ll be glad to guide over a longer period of time. mbeon is an online advisory service for migrants via the mbeon-app, which you can download on your smartphone for free. You'll find me in the mbeon-app under my name „München, Frau Müller“ and get confidential one-to-one advice in a safe virtual room where nobody can read messages. For further information please visit www.mbeon.de.
Download for Android: https://play.google.com/store/apps/details?id=de.zone35.mbeon
Download for iOS: https://apps.apple.com/de/app/mbeon-messengerberatung/id1408795643