Advance parole questions?

Hello Dreamers...

I would appreciate anyone that can give me some feedback on their experinces please?
I requested my advance parole for education purposes I was granted the advance parole for 6 weeks to Brazil. I have a few concerns about the permit.
1.When I intend to come back to the US what will I be asked for what documents should I have in handy and what should I be answering back?

2.When do they stamp my password is it when I enter Brazil or do they stamp in on my entry to the US?? Do one of you know what the stamp says ? is it just a date or does it say the purpose of the travel or how doe sthat work??

3. Form what I read its best to have a flight with no stops however I cant find any flights like that most floghts stop in miami, is that safe?

4. Does anyone know about Brazialian visas and if I need to issue one even though my stay will be for less than 90 days? (to a private institution)

This is my first time leaving the US, any other feedback or recommendations would be greatly appreciated.

Thanks

Check my response in the other thread.

You can check to see if you need a visa on visahq. Check also if you'll need a Transit Visa if you'll be passing through countries. (Ex. A connecting flight in Panama,etc)

Are you doing this as part of your university program? I've already graduated but wanted to participate in a course abroad. What information did you provide? Thanks in advance!