It is true that if you get Q visa status, you can be a Q1 for up to 15 months, and you cannot be readmitted as a Q1 until you spend one full year...

You cannot change status if you are not in status. You cannot enter on a J2 of you are married to an H1b. She may want to consular process for an...

Since an RN does not require a master's degree, you cannot get an EB2 whether or not you have a masters degree, for a job as an RN.

You can check the CIS website for the possible questions. It is very unlikely you will get exactly the same questions you got before.

You can file a Uniting for Ukraine application for her.

Whichever one is earlier. You can retain the priority date from your first filing.

If you petition for him and he becomes a permanent resident, it should not be a problem.

You may wish to check if it was an arrest or a ticket. No, I doubt it will be an issue.

Better to start the five years from the date you returned to the U.S. The issue is not whether you abandoned your permanent residence but rather...

Yes, and H1b can buy a house in which to live in the U.S.