Applying I-485 while wife is on F1.

Congrats. If you have had an attorney for your I-140, she/he should be able to help you with I-485.

How can I get my citizenship

I am sorry to hear that but you need to consult with an attorney in private.

How long does the i485 for NIW case usually take for approval?

Are you asking I-140 or I-485? These are two different forms and procedures. I-485 generally takes a few months or less.

How to find whether a program is STEM approved by USCIS or not

Seek advice of your international office.

Can someone sign an NDA on H4 visa. ?

If it is considered a job done routinely by volunteers, it should be fine.

Can I change my address online?

By law, you are required to report any change of status within or less than 10 days to USCIS if you are not UC citizen. Do not wait any longer.

This sounds like scam. You also can contact your school's general counsel or any attorney within your school's international office.

Both your mother and your sister can apply for you. It may take a long time though. You need to change your status or leave the country and come...

What should answer question 15? Just f1 overstay student (out of status ) ?

You need to write the truth. Expired F1.

While I wait for i130 approval. May I still apply to renew my driver license?

Ask the DMV office of your state, you should be able to renew it.