Clueless au pair in need of advice!

Hello! I’m a Brazilian au pair and I’ll be travelling to meet my host family late January in the US for an exchange program.

(English is not my first language, sorry for any spelling mistakes)

I want to be a good guest at my future HF house, and I’m planning to bring gifts from my country and I’m doing my best to be respectful and mindful of what I give. I was thinking of bringing some common candies and snacks from my country, and I’ve been looking for kosher brands.

Now, I’m wondering if there might be any differences between kosher rules in different countries, and if it would be okay for them to eat these snacks.

Also, if you have any tips on culture and religion, these are most welcome. I’m not jewish and I’m truly trying to not be rude or inconvenient, I want to educate myself and be able to respect and cherish this culture.

Thank you for your attention!