Question About Story Revamps + Talk About Social Anxiety

I want to revamp one of my older stories. It just kind of spiraled to a place that I'm not happy with and my writing has improved since then, but it's still a plot that I'm interested in writing. I was just wondering if it would be okay to delete the story, but repost the first chapter without any changes as I'm happy with that one as it is? I don't see why it wouldn't be okay, but I just want to check first.

This year in English Literature, part of our coursework is meant to be on a novel we've chosen by ourselves. It's my second and final year of A-Levels and by doing this we're showing that we can take what we've been taught in the previous year and apply it to texts which haven't been taught to us by the teachers. I'm going to be doing mine on feminism in A Game of Thrones by George R.R. Martin. Before we get into this, however, he's decided he wants us all to do individual presentations to the class on our favourite book.

English Literature is the only class where I feel truly uncomfortable. I know few people in my Pyschology, History and Photography classes but the people there are nice. The ones in my English class? Not so much. Not that there aren't nice people there, but most of them are just...extremely unwelcoming, which affects me more than it might other people because I have intense social anxiety (it's gotten to the point where I've passed out in classes before). I know for a fact that if I went ahead with this presentation, I would stutter, I would blush, I would shake and I might pass out.

I wouldn't mind as much if this was for a grade. But it's not. He's just one of those teachers with a love of presentations. I don't want to go to him and talk about my social anxiety, well, because of my social anxiety. It feels like such a cop out - a bad excuse. I'm terrified that if I do, he'll just go "give it a try!" or "don't be shy!" or whatever. I have him in the morning on Monday and in the afternoon on Tuesday, so I'm going to go into school late on Monday and leave early on Tuesday. My dad is fully supportive of me in this because he knows how bad I can get, and so he says he'll happily call my tutor for me and say I have to see a doctor which is why I need to miss a few lessons - I'll miss the next three lessons so chances are I won't have to present my work. I'm just terrified that I'll go back and he'll make me do it anyway. I doubt it, but I'm terrified. This is why I hate having social anxiety. It gets in the way of so many things and affects me so severely.