Welcome to our community and thank you for your question.
In general, you don't get the German citizenship just by being born in Germany.
If one (or both) of your parents are Germans you get the citizenship automatically. If you were born on the 1st January 2000 (or later) and if one (or both) of your parents legally resided in Germany for at least 8 years, you also get the German citizenship. Since you were born in 1999 this rule doesn't apply.
However, it is possible to obtain the German citizenship by legally residing here for at least 8 years (if you go to an "Integrationskurs" it will be shortened to 7 years - under certain conditions it's even possible to apply for naturalization after 6 years). In addition, you need to fulfil a number of other requirements. Please check the following thread here on Wefugees to find extensive information on this topic:
I hope this answer was helpful to you!