You might want to consider the start in a backwards fashion.
Instead of choosing a start towards everything, create goals instead and break them down into their individual parts.
Example: How to create a huge photo realistic open world. First, we would be introduced to the main parts and then each can be expanded into smaller segments. Each segment could be a very short tutorial, both written, with images, as well as videos. In the accompanying article, links could be provided to the documentation.
Depending on the user’s experience, one could choose where to begin to reach that final goal.
For each path, there could be underlying parts all the way down to how to create an EPIC account, download the launcher and install the engine. Plus, required underlying parts, such as how to use nanite, lumen, quixel and all that realism stuff.
For animations, there would be different underlying parts, and yet, the first underlying part would of course be total beginners; sign up, download, install and from there, enable Control Rig etc.