How to Learn How To Build In Minecraft?

So I have had Minecraft for 5 years now, and I have always been awful at building.
I' have always looked at other people's builds and have thought that I want to do that but I just don't have the talent to.
I did use tutorials to make pixelart for a while, but it just felt that I was stealing from others. The thing I want to build is big amazing builds like mansions, and colossal structures from shows/movies/video games, but I have no idea how, and again, I'm awful at building.
It seems to me that I have no talents in the game, and I really want to make these things.
How do I start?

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