Questions about Re-Entry Permit

Hello friends,

I and my family received our green cards in September 2020. As both my parents and in-laws are aged, we are planning to apply for re-entry permit and going back to our home country to stay with our parents for sometime. However, I have couple of questions related to re-entry permit. Can someone clarify?

  1. Do I need go through an Attorney to apply for re-entry permit? I assume the answer is No, but just wanted to confirm.
  2. Assuming that I apply for re-entry permit on March 1, 2021 and our re-entry permit is going to be for 2 years, what is the time period of stay in our home country? Is it going to be March 1, 2021 to February 28, 2023 or is it from the date of approval?
  3. I have heard that some people leave USA after completing the biometrics and get their re-entry permit in their home country. Is this possible? If so, how does the 2 year calculation work? Is it from the date they left USA or from the date of approval?