Windows on Mac nearly made me lose my schoolwork

Problem 1: Your drive is 128 GB. Windows requires at least 64GB of disk space. The OS will take up about half of that. You're splitting your drive between two modern operating systems that will both consume dozens of gigabytes at the absolute minimum with nothing else installed. Systems like Android know smartphones have lower storage amounts (especially cheaper and/or older devices), so they're designed to take up less space. This is not true with Mac and Windows.

Problem 2: You didn't change the partition size. I've done it a number of times in the past, and it works well enough. If you couldn't make it work, you probably should have found a sighted person to help or asked the blind community.

Problem 3: Even after checking available storage (with another person) and realizing it's only 300 MB, you continued forward. This is not enough storage for anything.

Problem 4: You deleted your Windows partition without backing anything up. What did you think was going to happen? Windows and Mac use completely different filesystems. Of course your files would be deleted.

Problem 5: Your computer was being slow. Of course it was. You filled the disk up to capacity. That's what happens when you fill the disk to capacity. Your computer can no longer freely write data to the drive. It now has to spend extra time shuffling bits around and trying to optimize their arrangement on the NAND flash chips. This will reduce the lifespan of your SSD, by the way. It causes unnecessary wear on the cells.

Bonus problem: you handed your machine off to another person to install critical files. Bad infosec.

As somebody who loves throwing shade at Apple, this was almost entirely your fault. Frankly, the fact that reversing the position of command and option keys breaks them in Voiceover is far stupider a problem, but I digress.

You need more storage for dual-booting, you should seek sighted assistance which it sounds like you have, 300 MB isn't even enough to run Chrome (let alone save everything on your OS), I agree with @Siobhan about getting a cheap Windows machine, and I can't even figure out what you're saying when you randomly mention Twitter. Voice typing?

I'm going to be blunt, it's hard to believe your apology when you make posts like this. You at least recognized you messed up, but just this once, this isn't Apple's fault.

64 GB is listed in the system requirements, however a base install of Windows 11 will take up around 27.5 GB. Mac OS isn't far behind with storage requirements varying anywhere from 18 GB to 44 GB, depending on which version you're installing. Operating systems have gotten big in the past decade. In Windows (and any other OS), you'd want the extra space to store programs and data as well as temporary files, caches, memory dumps, and anything you download or create. Drives get very slow when near or at full capacity because of how data is stored and retrieved in clusters, rather than individual bits. The computer and storage controller have to take extra time shifting data around, getting each cluster to be as full as possible to maximize available storage. It's easier to just buy a bigger drive and not worry about it. Your computer runs faster, your SSD lasts longer, you don't have to worry about deleting stuff every time you install a program, developers can make increasingly complex software that can do more (like store the dataset for a large language model like gpt4), and the storage manufacturer goes to the bank. Everybody wins.

The only current Mac with upgradeable storage and RAM nowadays is the Mac Pro. The Mac Studio has internal SSD connectors, but the memory is not user-upgradeable thanks to Apple nanny-stating the hardware and locking everything down with component serialization and cryptographic pairing. Older Macs, such as pre-m1 iMacs used a Sata storage drive, so you could upgrade those as long as you were willing to crack the iMac open and deal with the exposed power supply. This is how several iMacs that shipped with hard drives ended up with SSDs. You did need to add a temperature probe, otherwise the fans would spin at full speed forever, but that was relatively minor. Sadly, all the MacBooks that have been shipping for years now, along with the m-series iMacs, and Mac Mini have had soldered memory chips and controllers with encryption keys paired to the T2 chip in Intel Macs and the CPU in m-series Macs. This means if those keys are lost due to hardware failure, you would lose your data forever and not even Apple could retrieve it.

You could upgrade the RAM for quite a while longer on the iMac and Mac Mini (the MacBooks have had soldered RAM chips for ages), but this is no more on anything with an m-series chip because the RAM is integrated directly onto the SOC.

So yeah, nowadays, your only real option is to pony up 5 grand for a cheese grater or to go out and buy an external drive like the Samsung t5 and hook it up over USB 3.2 gen2x2 electric boogaloo uwu (what was the USB IF thinking with that name lol)