If you want, you could send me an email with your CV to firstname.lastname@example.org? I can forward it to an NGO that is looking for an accounting assistant at the moment. As the position won't be filled before the beginning of September they might be open to welcoming you in their accounting team for the interim period, e.g. for August.
Of course I cannot promise anything yet, but with your CV at hand it will be the easiest to get a quick reply.
One question that is important for that: Is your degree in Finance & Accounting already recognised in Germany?
Should you be unsure about that it doesn't matter yet. However, https://www.anerkennung-in-deutschland.de/html/ar/index.php
might be helpful anyway.