Consult with a an immigration attorney lawyer with proven naturalization experience before filing.

A FOIA request is an efficient and reliable way to get your I-485 receipt.

In general, six months is recommended before switching employment.

To be exempted from renewing your PRC while N-400 is pending, you must have filed N-400 when PRC is current.

It appears you don't have a US immigration law question.

A lawyer has to review the USCIS denial before providing you guidance what to do.

The I-864 is not required. USCIS will contact you if any further documentation is required.

There should be no concerns. Last USCIS work on your case was 12/9/2022. Stay tuned on development soon.

In general, yes. You should contact the embassy to which you want to transfer your immigrant visa case in writing to request your case transfer....

Ok you may in CA. If you plan in practicing in other states, not necessarily so. Did you chat with your school DSO? If not, may be a good idea....