I watched about ten YouTube tutorials that made cutting glass look incredibly satisfying and simple, just a quick score with a cheap tool and a confident snap, but let me tell you, the reality is me standing in my garage surrounded by jagged shards of expensive mirror while bleeding through a paper towel. I honestly don't get why they don't emphasize that if you apply just slightly too much pressure, you don't just score the glass, you create these micro-fractures that cause the break to run off into a chaotic spiderweb instead of a straight line... and if you apply too little pressure, absolutely nothing happens except you ruining the surface, so you try to go over the line again which is apparently the cardinal sin of cutting glass at home mistakes because it instantly destroys the cutter wheel.
The scariest part was when I tried to cut a piece of glass I salvaged from an old cabinet door, not realizing it was tempered safety glass until the moment I tried to snap the score line and the entire sheet literally exploded in my face—thank god I was wearing safety glasses or I would be blind right now. It shattered into a million tiny cubes that flew everywhere, into my shoes, my pockets, and I'm still finding pieces of it in the driveway weeks later... it is just not worth the risk or the hassle of trying to sand down the razor-sharp edges with regular sandpaper which takes hours and sounds like fingernails on a chalkboard.
Save yourself the agony and just take your measurements to a local hardware store, because unless you have a professional table and high-grade cutting oil, you are just going to waste material. If you absolutely insist on trying this dangerous hobby, please check a detailed DIY safety guide first to learn how to distinguish between annealed and tempered glass, otherwise you might end up explaining to an ER doctor why you thought you could be a glazier for a day.
