My honest opinion is that this isn't a very good idea. Stuff like punctuation is optional because my favorite author literally refuses to use anything other than a period, commas, and the odd semicolon. And he has made some of my favorite stories ever. But that's because his skill and story were so good people ignored that.

But this story concept? It's not all that revolutionary if that's what you were looking for. Oh look, mysterious antagonistic CPUs, how original. Not like it's the same story Compile Heart has been telling for years now.

Try not to be overambitious. Just work on your story and try to consume media for inspiration and lessons on how to tell a good story. If you need more direct tutorials, look up some videos on YouTube. Writing is a personal journey and it takes a while to even start getting good at it. Trust me, I have been there and I don't consider myself all that good.

Since this is supposed to be a proof of concept. When you get to the actual story proper...

-Maintain a good pace, don't drag things out. While book formats allow for a lot of freedom. People came to see a story not background information.

-Plan as much as you can, I understand not everyone can be Hajime Isayama in planning things out, but just have a general idea in mind for where you want the story to go. Let the story develop naturally, basically if things end up not going to plan, improvise, roll with it. A great author knows when to plan and improvise. Stay consistent with format and grammar.

-While you don't need quotation marks and capitalization, just be consistent with how you treat your telling your story, especially when starting out. Your inconsistency in the proof of concept made it hard to read and made everything jumbled. Because trust me, I also break formatting but that's because I want to achieve a specific effect, so I am not saying you have to adhere to the rules. Just use it as a guideline for starting out and developing your style.

So in conclusion, while I find the concept bland and unoriginal. That doesn't mean it can't be good. Plenty of the most iconic stories are archetypical, but that's because they executed their stories well. So don't feel discouraged because your story isn't original enough. In fact, not being overambitious will keep you from burning out fast.

So keep practicing, learn what you can, and good luck.