According to the Federal Training Assistance Act (BAföG for short), German students receive state support during the standard period of study, provided that their parents' income and their own income and assets do not exceed certain limits. Foreign students are also eligible for BAföG funding under certain conditions. Half of the funding is a study grant that does not have to be repaid, the other half is granted as an interest-free loan, which has to be repaid in installments or as a block 5 years after the end of the standard period of study. If you repay the part of the loan in installments or if you are among the top 30% of the class in your degree course or if you have already successfully completed your studies before the end of the standard period of study, you will receive further discounts.
It is therefore always worth submitting a BAföG application. You can apply for BAföG at the Studierendenwerk OstNiedersachsen, where you can also get advice on your BAföG. On the page https://www.bafoeg-rechner.de/ you will also find a lot more information about BAföG as well as the possibility to determine the amount of your BAföG entitlement in advance. Application forms can be downloaded from the BMBF website. Ask the staff of the Student Finance Department at the Studierendenwerk for advice on your own entitlements.