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