Should not have a problem with that I-539.

Need to apply for a second extension before the expiration date of the first one.

You can do with your salary as you see fit.

Show your criminal case paperwork to an immigration lawyer.

How long after receiving the Green Card can I switch to a new employer?

You are now safely beyond the minimum expected period. Can switch.

I agree. No longer a concern at the I-751 stage.

H2B visa, visa worker

You need to timely apply for change of status to visitor.

You need the Indian consulate to issue you a new passport with which to travel.

What should an undocumented worker do in the case of being pulled over, and cited for no drivers license?

The administration has changed - no one will be "taken to be deported" now.

Can we stay unpaid on STEM OPT?

OPT STEM employment requires that it be paid employment.