Well, it depends.
Here's what high school is like from my experience.
A normal day... not much happens, except before and after school with the chaos that is riding the bus.
The typical lunches are either burgers, nachos, sandwiches, or pizza.
The bullies are almost entirely verbal, and almost anyone can be one.
As for how people react to LGBTQ+ people... there are three kinds of people.
1- Homophobes (surprisingly rare)
2- People who make LGBTQ+ comments as a joke and honestly don't care
3- People who are part of the LGBTQ+ community and are supportive