Get green card for my brothers and sisters?

Sibling based petitions take 12-14 years.

No your spouse is not required to attend.

Fiance here on visitor visa, can he adjust ?

Yes you may adjust status 90 days after entry through good faith marriage to a USC. Best to consult with an attorney for guidance. Good luck!

Refer to the rejection notice and respond accordingly. May be best to provide fresh signature pages.

Status change interview

Yes it is advisable to have guidance and assistance from an attorney for interview purposes.

Yes unemployment benefits are not considered public benefits.

I received a letter from USCIS what should I do, uscis can not answer your inquiry over the phone or through a referral.

Best to have an experienced attorney review your case.

Looking for assistance to extend B1/B2 Visa for my mother who is currently in USA?

You may use the Avvo search tool to find a reputable and experienced attorney.

No this is not necessarily something to be worried about. You may consult with an attorney to review the specifics of your case.

Based on the information provided, you may answer No.