So I came to Germany back in 2016 and started working full time for an IT company. I got hold of the Blue card which gave me permission to work and I continued doing so for 3 years. Aftwards I got done with B1 language test and then applied for my Niederlassungserlaubnis. Got my Niederlassungserlaubnis just a few months ago (mid 2020). Everything good and fine.
The situation is that due to some circumstances in my current company, I would like to quit my job now because the mental stress of all the things happening are way too much to handle. There is also a very high chance that they force me to resign (not sure, though I would now want to resign now really and get it over with). The question is that would anything change in my residence status ? I do have some savings with me so I can easily support myself for 6 months or so and I also hope to find a new job during the notice period (3 months).
The only thing that is worrying me is that in case it takes longer than the notice period time to find a job, would the KVR or Ausländerbehörde or any other office needs to be informed ? Any thing that I have to do for my health insurance? I don't want to apply for Arbeitslosgeld since I have enough savings to support myself and I am in IT, so hopefully it won't also take a crazy amount of time to find another job. I just want to know if legally I am supposed to do something else or I just resign and start my search for another job?