B-2 Visa

I have an approved I-140 (Approved in Feb 2022) which is already 6 months past the approval date & my priority date is August 2020. I am currently on H1B visa where I have already completed my 1st 3 years and currently am on the 1st 3 year extension.

My question is :

1.If for any odd reason I lose my job in the US, and I am not able to find another job within the 60 days grace period, what alternatives do I have within the US and find a job (H4 is not an option for me currently) ? Would joining a consultancy be a safe option to stop accruing unlawful presence OR compelling circumstance EAD ?

2. If I decide that going to India is a better option and want to come back after some time to the US, would I be subject to the H1B lottery at any point in future if my 6 years of H1B is exhausted ? What information or documents are needed to assist for returning back to the US ?

Currently, I am holding a STEM OPT from May 2022 until May 2024 (2 years).

My employer had applied for H1B this year and last year but had no luck.

Question and suggestion, please:

1) What are my legal options?

1.1 Apply for H1b next year in March and wait for the result, In case H1b is picked, how do I process it as my STEM opt expires in May 2024?

2) Enroll in university for the Master's degree?

2.1 I have a few classes remaining for my master's as I have finished my bachelor's degree in the USA and I take Day One CPT? Once a master's degree is complete, reapply for OPT and STEM OPT.

2.2 Should I continue to apply for H1B in the meantime?

3) If I apply for Master and Day One CPT, do I need to enroll for May–August 2024 (the summer class) or can I enroll for Fall 2024?

Note: STEM OPT Expires: May 15, 2024, or please suggest any other better option to stay in the USA.

Lastly, my passport expires in May 2024 as well. Is there any problem there?

- I'm thinking of starting the process for the renewal online. Should I do it now or wait for some time?

My sister is in India and the prospective groom is a US citizen. They have concerns about how to proceed with marriage and relocation of the girl to US in a timely manner (prefer not to wait more than a year for marriage/ living together post-marriage for personal reasons) Current fiancé visa processing time seems to be 15 months. It was not this long pre-covid, realistically can this processing time reduce this year? If they do marriage in India first, what’s the quickest way for her to come to US and how long would it take She has a valid B1. Can she travel on that to US post-marriage for 5-6 months only without any risk to her green card application? She is trying to get an L1-B visa through her current company. Will that visa approval be affected if they get married in the meanwhile? In short, what is the quickest path for her marriage & relocation to the US right now?

1. I am on H1B VISA and was notified that my employment will end on January 20th. I am actively seeking new job opportunities. Can you please let me know what happens if I am still interviewing after 60 days and become out of status? 
2. Do I have any other options to change my VISA status before/after my employment is terminated and I fail to secure a job before the 60-day period is over? 
3. Does my VISA become invalid after the 60 days or can I still find a job and reactivate it if I get an offer after the 60-days?