There are several examples of figurative language in chapter 3 alone.
Consider this reference early in the chapter:
The producers of Expedition Survival! loved Lee Bluepenny’s new Australian accent, which he had shamelessly copied from the late Steve Irwin, the legendary crocodile hunter.
This is an allusion, which is referencing a person, event, or place that exists outside the text. Steve Irwin was a legendary outdoorsman whose fame really catapulted in the 1990s. His bravery, caught on camera, brought new admiration to many creatures which had often been feared and mistreated.
Another example of figurative language can be found in this line:
Derek’s punctured lips swelled up so badly from the bite that he looked like he was sucking on a football.
It might be tempting to label this a simile because of the word like, but I'd argue that this is an example of a hyperbole. The imagery is trying to convey how large Derek's lips had gotten. He didn't literally look like he'd been sucking on a football, but this exaggeration provides a (humorous) visual to explain just how large his lips had grown.
Later in chapter three, you'll find this line:
She was accustomed to working around Derek’s enormous ego, but there were times when she felt like reminding him that he was basically a tap dancer, not a grizzled woodsman.
This is an example of a metaphor. Derek is compared to a tap dancer, which isn't exactly the kind of persona you'd expect to be wrestling pythons. Derek believes himself to be more rugged than he actually is.
There is also a great example of imagery later in this chapter:
He sat down on the ground near Beulah and she glided slowly in his direction. Her brick-sized head was elevated, the silky tongue flicking slowly.
This provides a stunning visual image about how the python moves as she decides to attack Mickey. She is curious, moving slowly, her tongue flickering as she considers that he might be her next meal.
I hope this gives you a good starting point as you locate other examples of figurative language in these chapters. Good luck!