Family-Based Green Cards

I got married last month ! My husband is a GC holder and next year is going to become Citizen , I have my GC (I-140- Approved) with a priority date of September 2019 on EB3 . What are my best options here ? Do I wait for him to become a citizen and then apply for my GC through his citizenship ? Or shall I apply GC now through his GC status, before he becomes a citizen ? Or shall I wait for mine ? Will my pending GC still be valid if I apply through my spouse ?

I am 19 years old and live with my parents in India.  I have an approved F3 family based immigrant petition which the National Visa Center has shown as “documentarily qualified” since April 2020 My priority date became current in January, 2021. I am waiting for my interview and  have received three  emails, each requesting I wait another 60 days for my next reply. This fall I enrolled in an associate degree program at  a community college in Maryland. I am studying online from India. Should I apply for an expedited F3 family based visa interview based on my educational needs if I want to go and study in the U.S.?

1) Please list out what are the documents need to be carried for final interview by main applicant and the dependents?

2) What are the general questions we can expect from the officer during the interview who makes decision and how the interview process will be, so we can be aware and prepare ourselves?

I am planning to file green card (I130/I1485) for my mother. She was born in 1949 in India and does not have her birth certificate. Only identity with date of birth she has is her passport and Aadhar card. She has visited US couple of times.

1. I want to know is it required for her to submit birth certificate or a non-availability of birth certificate for I485?
2. What are the options if these documents are not available?
3. Does USCIS accept birth certificate from the Indian consulate in NY?