I don't ever bullshit. You have definite talent and writing skills.
This is how I would workshop the piece in a class, that is, my constructive feedback for the purpose of helping you make the work the best it can be. Take what you want from this, dump what you don't:
You have an excellent handle on bringing in the sensory aspects to make a scene alive: sounds, colors, etc.
You have a great imagination, and a flair for action and suspense.
I would start the piece at,
'Weed for days and ain't no Mormon in sight! Damn what a liberation!'
A strong opening draws in the reader. Often what we start with as writers is vomit that we need to get out first, then cut it once the real start is revealed.
Writer's rule of thumb: never be afraid to kill your darlings. You may be attached to something you wrote, but if it doesn't benefit the piece, be ruthless. Cut and save it for another piece, a different chapter, etc.
Note that you switch between present and past tense, choose whichever one resonates more. Are you telling about something that happened or is happening? Because it the scene so vivid and so now, I would keep it present tense to be there with Amber. I feel like I'm invisibly walking along side her. That's good.
Writer's rule of thumb: show, don't tell. You already have a good start on this. Show what the character is feeling by how she moves, walks, kicks things, through her actions. This will reveal her inner world, what motivates her. I wouldn't tell much if any of her inner world at this point, if ever. I would let her actions, interactions, and dialogue reveal it.
Know your characters' deepest desire, deepest fear, biggest regret, Achille's heels to overcome, blind spots, what they're proud of, etc. These things may never be revealed to the reader, or maybe they will, but this will make your characters real to you, and they will write their own stories, they will do things you don't expect but are totally authentic.
It was a bit abrupt to identify her high school nemesis, make the reader curious and reveal it later. Show the nemesis, show her behind the wheel, show how the car is moving, make the sounds, etc. Make the reader curious as to why the protagonist would have such an extreme reaction, reveal it later. High school nemesis at this point feels weak.
Avoid adverbs. Use the show don't tell rule. Adverbs are weak and take away opportunities to reveal character or story. One can walk quickly, or one can stomp across crisp leaves, muttering in cadence, "That BITCH! I HOPE she DIES to-DAY!"
I think the intro and the intermission are for your benefit to guide you in world- and plot-building. What lies between those two parts feels like a prologue. I am sucked in. Next would be a totally different scene in the present, and Amber's story would come in and continue later.
Future writing tips: write a scene from different points of view: each character, an observer, a object in the room, etc. When a scene isn't working or is dull, see what happens if you bring in someone new and totally unexpected, even incongruous. Maybe someone you saw in public, someone you know or knew. This may even develop into a character, or it may reveal what's lacking in the scene or in character development, bit it usually helps the writer see that it's time to shake shit up.
I hope this helps and encourages you! You've got great potential and natural talent, I think you will also develop great skill! I think you have a natural voice and it won't take you long to really make it work for you. Keep going. When you find your voice, you'll know it, and I suspect it won't take long.
If you do a rewrite of this scene, I hope you'll share it!
