My Self-Drafted/Rub-Off/Draped Simple Shirt

Sounds simple, right? I certainly thought so. I got really, unreasonably excited when I found this guide from Mad Mim on how to draft a pattern based on measurements. I had saved the last of the Christmas wrapping paper with this project in mind, and did all the math (dividing in halves and quarters and adding ease and so on) TWICE. Because, if you'll remember, I'm focused on doing things right. I drew out all the lines, measured down, double checked that I was perpendicular, connected the lines with my wonderfully useful drafting ruler, and ended up with something that resembled this:

If I were a bell I'd be ringing, amiright?