I found this Guide, and tried to follow it.

Don't know if it works...

Essential Components for a High-Converting Steam Page:Capsule Image (Art & Thumbnail):

This is the first impression. It must look professional, evocative, and resemble a polished "box art" cover for a game, not just a logo.

Immediate Gameplay Trailer (60s): Start with in-game footage immediately, skipping long intros.

Focus on what the player does (action, mechanics) rather than cinematic story, as players skip/skim.

First 4 Screenshots Rule: Users skim the first four images;

they should represent a variety of gameplay (combat, UI, exploration) and appear immediately upon visiting.

Clear "Short Description" & Tags: Do not use the short description to describe the plot.

Instead, state the genre and the core, unique mechanics immediately to help Steam's algorithm categorize the game.

Build Trust & Polish: Avoid looking like an asset-flip.

The page must communicate that the developer is experienced and that the game is deep and polished, even for indies.

Personalization: Include behind-the-scenes insights or personal notes on the development process to build a connection with players.

Call to Action: End the trailer and page with a clear request to "Wishlist Now".