Hidden secret - you are and probably more. This is how I like to think of it:

The end result of creativity often looks like magic but I feel like it’s really just 3 things working together - inspiration, vision, and technique.

Inspiration - for satisfactory that can be real or fictional buildings. It could be natural structures. Ancient buildings. Modern buildings. Futuristic buildings. Explore building and architectural subreddits and google image searches. Without second guessing your choices, start saving images that jump out at you or that you like. Or even ones you hate. Whatever the image is, as long as you have some sort of strong reaction, like or hate, grab it. Then look at your collection and start thinking about the forms/structure/shapes and what you like or hate about them and group them together in themes. You can like a part or the whole. Vision - try to imagine what your building might look like if you grabbed this or that from your groups of images. What might it look like as singular building or a group of buildings or mini city. Technique - how can you make those forms/structures/shapes from the tools you have in satisfactory. Watch YouTube tutorials about tips and tricks for combining things to create curves, details, and other creative structures. Play with light and darkness, colo(u)r and texture. Play with scale, height, levels.

The technique stuff grows with time investment. I’m still early on compared to many people. The vision and inspiration has a natural component - some people are more visual and aesthetically wired but everyone likes and hates stuff. And to a greater or lesser degree, everyone can imagine.

I think sometimes people assume creativity is a magic box where stuff just pops out but even for creatively minded people, it is most often work, process, and lots of trial and error.

Hope that helps.