Entering US on B1/B2 and seek/offered a job

If you had told the IS consulate or CBP that you were coming to US on a b visa to seek employment, you would not receive a visa and entry likely...

I filed form i-130 for my husband but meanwhile I'm staying in Australia(not my national country) while he is completing edu.

If you are a permanent resident filing for your spouse, you do not have biometrics. Remaining outside the U.S. For one year or more is likely to...

This happens on a regular basis. Just wait and see what comes.

Immigration question.

It is likely you will eventually receive a notice of intent to revoke (NOIR). You should meet with an immigration attorney to prepare.

PERM Approved but I-140 still pending after responding to the RFE query

Analysis is not possible with the limited information. Speak with your employers immigration attorney, whom has the entire record.

My case status shows my GC was mailed to me on June 16. How long does it take to get the card.

I agree with my colleagues. Congratulations about a week

Paid the IV fee and got directed to complete form DS-260 but can't access it.

There are issues, try again and call customer support.

Currently USCIS has suspended premium processing for H1B Visa Extensions. Can I file for L1B extension as premium processing?

Not sure why you would want premium process but unless suspended by CIS you may use.

Am I inadmissible to the United States? If I am Can I do something to fix it?

Meet with an immigration attorney before going further. The answer is in the details of your matters and it is important to have them reviewed...

Do colleges accept out-of-status immigrants ?

You will need to contact the college and inquire.