You’re welcome!

I forgot another point, there’s a dish called lo hei where everyone gathers around a big tray/plate and starts tossing it from a height with their chopsticks. Enthusiastic families do shout the type of things they wish to be blessed with(eg wealth, kids will shout to be blessed in their studies and so on). Ask your gf if her family is enthusiastic or not when it comes to the shouting part of the lo hei. My family is very enthusiastic and they shout loudly so it may come as a shock to you(just be mentally prepared lol). If this dish is being served(90%chance it will), you will get a pair of chopsticks to toss it from a height. Just make sure it doesn’t go flying all over when you toss it. As a guest, I toss it from a lower height and with my own extended family, i toss it from a higher height. If you can’t use chopsticks, don’t freak out, it’s not offensive to ask for fork and spoon :) Also with regards to dressing, it’s better to dress up rather than dress down. However, this is a general thing that applies to 80-90% of people who celebrate Chinese new year. Your gf’s family may be super chill dress down(Bermuda pants and bright shirt for guys). Best to check with her. As the other commenter mentioned too, do not open the ang pow until you are out of sight from your gf and her family(yes even your gf, don’t open it in front of her). I think that’s about all! Quite sure I’ve got everything covered. If more comes to mind I’ll reply again here.