Originally Posted by _Maxi

Hey 1nterceptor, I took the bike early to a bike repair shop ("Larry's" near the Central Park) and the issue was that the derailler was missing another piece too. They fixed my bike using a better derailler and prepared my bike for only 35 dollars total.

So I got the problem fixed.

Thank you all for you time and effort for a foreign person. I appreciate it a lot, thanks again!!