It is usually improper to be asked about arrest history. Conviction history different story.

Black and white copy of passport is ok.

Shouldn't impact, but always best to get the ACD.

Major privacy violation. It would have been ok to disclose that an employee tested positive (probably required to do so), but not disclose who the...

No need to inform USCIS, new attorney can take care of everything.

Yes it can be dismissed and/or reduced.

Unless you file a motion to seal, it will be visible forever. Looks like you can seal it based on what you wrote.

Always recommend using a lawyer when you have a criminal issue.

If your spouse is a citizen or a green card holder, they can sponsor you once you're married. I highly recommend doing this process with an...

I agree with the above attorney. It's also possible in many jurisdictions to deal with the warrant without you having to appear.