Hello everyone,
Arina kindly looked at it and gave me feedback. The opening works, but after it the navigation needs to be clearer, and she suggested designing that part by hand in Figma before coding it. It made me realize how much this way of designing leans on storytelling, and that the UX and UI have to carry the story without getting in the way.
So I went looking for a good place to deepen my UX and UI knowledge, and I found the Interaction Design Foundation (ixdf.org). They have a lot of solid courses and material, and I find it very affordable for what you get. In case anyone here wants to go deeper into UX and UI for immersive sites, it might be worth a look. Happy to share how it goes.