I'm probably not the right person to be answering any sports related questions - not really a fan of sports in general. I wasn't even aware that Australia is hosting the FIFA Women's World Cup

Although that in itself may mean it's not considered a big deal... I would have thought I'd see something about it in the news or at least the facebook grapevine.
Most of the Aussie DISers on this board are pretty familiar with the US and have been multiple times, so the US is probably far less mysterious to us than Australia is to you
A few things that spin me out (school and college are pretty front of mind because we see it so much in TV shows and movies)...
- That kids over there don't have to wear school uniforms. Also, we don't use freshman/sophomore/junior/senior. Over here, school years are just referred to as year 1-12. We only have 2 school levels - primary school which is year 1-6, and then high school which is year 7-12. For college students (we call it 'uni'), we just say first year, second year etc.
- That you can drive at 16. Over here, we don't get our license until 17. When you first get your license it's a red 'P' (provisional driver). After you've been driving for a year, you go onto a green 'P' for another 2 years. There are lots of additional rules for P-platers. Do you have a system like that over there?
- That you're legally considered an adult at 18, but you can't drink until 21. Our legal drinking age is 18 nation-wide. It's a bit of a downer for young people who travel to the US and are suddenly not allowed to drink anymore! Nothing really happens over here when you turn 21, but it's still considered a milestone birthday for some reason and people have big 21st parties.
- That school and college sports and cheerleading are such a big thing over there. We have physical education in school, but it's more about exposing kids to various types of sports and physical activity, teaching them foundational skills and encouraging fitness. When I was at school we used to focus on a different sport each term. Cheerleading isn't really a thing over here, and kids who want to play sport more seriously just join the local community team.
- Uni students don't really live on campus unless they're international students or from the country. Most kids just live at home and commute. Actually, I'm not sure whether that's something that's actually the case in the US too, but movies just make it seem like everyone lives on campus? Frat (or sorority) houses are definitely NOT a thing over here.
- The word 'fanny' means something different over here - it refers to the um... front part for women. Takes some getting used to hearing it used in general conversation

We're getting into the depths of winter down here, although for us that just means cooler temperatures and rain. In Australia it really only snows in the highest alpine regions of the Great Dividing Range between Melbourne and Sydney and in the higher alpine areas of Tasmania. Sometimes when the conditions are absolutely perfect (not even once a year), you might get an overnight snowfall in the smaller mountains closer to Melbourne, Sydney or Hobart. Unless you actually live there though, you'd struggle to get there before it melts. For most Australians, seeing snow requires a multi-day vacation, often involving air travel. I live in Perth at the moment, which is pretty similar to LA weather (although we've been getting an unusually large amount of rain recently!). I lived in Melbourne for a long time and that gets very dreary in winter with lots of cloud cover and drizzle and sometimes very little variance between minimum and maximum temperatures.