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>really makes me want to create a VN

Definitely give it a shot! I love VNs a lot, and would love to play more. VNs are easier to make then you think. My recommendation is that you download Renpy to see if you like it. There are other tools for VN creation, but I don't see them offer many features that make them worth the switch.

Included within your download of Renpy are two games, Tutorial and The Question. Tutorial is a Renpy tutorial in VN format with a cute lady explaining how to go about using Renpy in a very easy to understand way. The Question is a sample VN that you can edit, replace assets and dialogue and such. The script files for The Question is intentionally laid out in a very clean format, so as to show you how a proper script should look. 

For viewing .rpy files, I use Editra. For sound effects, I go to Zapsplat. For backgrounds, I go to Unsplash. Take those and some ripped sprites of your favorite chuubas off the internet, and just go at it! Oftentimes, if you have nice BG, it helps inspire the scene in your head.

Past that, it's all up to you. Creativity matters a lot, and it's cultivated over time. If you want my advice on how to REALLY make your VN stand out, I have three points. 

1. Animation: Every line of dialogue from a character should have an expression change or movement. This will be time consuming, but the finished product is really movielike and choreographed. It's fun to do too, like being a stage director!

2. Sound Effects: I used way less sound effects than I should have.  When used properly, they can add a lot of ambience. The hard part with sound effects is finding the perfect sound effect for your situation.

3. UI: To those who have played a lot of VNs, the default UI to Renpy is poison on the eyes. Definitely change up the images in the GUI folder, if you get the chance. Though since you're a beginner, you shouldn't worry much about this one, but it's definitely something to consider in the future when releasing a finished product. Adding image maps, jukeboxes, extras, are all fun little quality of life things that put a bit of extra soul into your project.

If you'll allow me to wax poetic for a moment, visual novels are a beautiful medium whose advantages haven't been fully captured yet, I feel. Their appeal lies more within a cinematic experience than the written word, and favors those who know their characters and can write snappy dialogue, but maybe flounder when it comes to scenic descriptions. It's closer to directing a movie than it is writing a book, so anticipate getting your hands dirty in writing, art, sound design, and coding. I don't mean to scare you off though, because it's all fun in very unique ways.

>in petra's ending was that an AoT reference or am I just misinterpreting it?

I felt bad killing the mood with that line, but I couldn't stop laughing every time I went over it in proofreading, and so I decided to leave it in.