APS certificate for Masters Application in Germany. How?

I'm planning to apply for masters in Germany in the winter semester. For that i need APS certificate. The process is super sketchy. Can anyone explain it to me or anybody who has submitted the application recently. Please, I need some guidance.

my_qualifications: B.tech in CSE, 2022 batch. Currently working in an MNC as a Data Engineer(2.5 yrs exp).