Look at the card and see what date it says you became a permanent resident. Add five years. That's the date you can file for naturalization.

You should consult a Canadian immigration lawyer about who can enter Canada.

You only need one, but you need one for each time you encounter DHS, including your naturalization and any other encounters. So get a dozen or so.

Check the form instruction. Not the field office, but the regional office.

You must be eligible for naturalization if you are still living with your USC spouse. That's the option, file for natz.

Yes, your second employer can file an h1b application for you while your application for extension is pending.

I would include it, but i have seen many other people omit it.

If USCIS rejects your application for a reentry permit, their rejection will not impact your permanent resident status.

Try driving in Indiana, or ask around for some other location that targets foreigners for arrest. Don't get me wrong, I love Indiana!

You will need to request humanitarian reinstatement from CIS. The ones I have requested have taken many years to get any response.