Welcome to the Wefugees Community and thank you for reaching out to us.
It is a bit difficult to give a tailored advice without knowing your personal background and your situation well.
However, I was thinking that you might want to check the conditions of the so-called "Beschäftigungsduldung" (more information also here), which gives the option to apply for a residence permit after holding it for 30 months.
Please don't hesitate to get back to us with any further questions.
All the best,