TIFU by driving like shit

Might a small fuck up, but it felt huge at the time and I feel I need to tell the story to get it off my chest. Sorry in advance if my English is a bit subpar and hard to interpret.
I'm attending trade school and have two classmates who I spend the days with the most. Today, each of us needed things from the store and as I was the one of two of us who had a relatively decent car, it was decided that I was the one to drive us there.
Getting to the store went smoothly and so did the ride back, everything good so far, despite me being an inexperienced driver and getting a bit nervous and overly analytical of my driving.
Then came the part of arriving at the school parking lot. As I had to reverse back in to the slot I left from, I began positioning the car in what I thought was a good approach. They did not agree.
I hadn't even begun to slow down, let alone put the gear in reverse, before they began commenting on and critiquing my positioning. This led to me suddenly being fully aware of my actions and stop driving autonomously, which of course led to me stalling. As if I wasn't getting agitated enough already, the stall got them loudly laughing at my poor attempt at driving.
Now I'm starting to fume a bit inside and the anxiousness shot up to the roof. I tried my best to shake it off and keep reverse parking but alas, my attempt was futile. This led me to lose my focus and my attention was redirected towards them and suddenly BAM, I had reversed into the car behind me.
Luckily this car belonged to my classmate that was in the car with me; his car is junkier than mine and the damage was just a chip off the clearcoat and he wasn't mad at all about it. But it's an event I won't forget anytime soon and something I now won't hear the end of, as they'll tease me about it until school's over and we part our ways.

TL;DR
I stalled my car when reverse parking, then lost focus and reversed into a classmates car.