Current USCIS published US citizen spousal sponsorship processing times are 12-24 months.

How would I go about changing my last name after I added a hyphenated last name when I became a naturalized citizen of the us ?

a naturalized US citizen with a hyphenated name change may contact the various offices to change their name; Social Security, DMV, etc..

Can I stay in the US after I file an adjustment of status, even if my original visa expires?

A person lawfully admitted to the US filing for adjustment must not depart the US when a nonimmigrant visa is expiring other than H or L.

A person with U visa status may apply for and receive a Green Card.

About My I485 interview next week during my ongoing Divorce?

The spouse cannot withdraw the application of a spouse.

Can you help with the below question? Can this visa be used to import?

A person may enter the US to attend school and after/during attending school change status to another visa.

Can I marry an immigrant in the usa without her having the fiancé visa???

A US citizen may marry a person admitted as a nonimmigrant in the usa without her having the fiancé visa.

Applying for STEM OPT extension?

Company must complete e-verify enrollment. there is a chance of denial if not enrolled when the extension was filed.

I only have DACA, can i travel to Hawaii? Would there be any issues?

Generally, a person with DACA and appropriate identification of this can travel within the US including Hawaii.

Many I-485 case reviews take a week or two. The regulations provide for 4 months to review. Some reviews take longer. Even longer processing time...