Yes, it is possible to apply for E2 by a person who is on a valid visitor's visa.

It depends on your immigration history. Speak to a lawyer to look at your specific situation. Good luck to you.

Probably no. It is best to consult a lawyer with your specific situation.

The U.S. Embassy in Georgetown, Guyana, remains the primary site to process immigrant visas for residents of Cuba.

You file for change of address, by completing AR11, USCIS makes the decision aapropriately. Good luck to you.

Yes, it is allowed provided a person is in status.

It is wise to consult with a lawyer for appropriate and correct guidance.

Yes, with a valid visa that is not voided or cancelled.

Probably not, unless USCIS ASC has a warrant to detain/arrest.

Yes, with a valid and verifiable address.