There is something called the "tutorial trap"
You know a lot of high-level theory and you've built a lot of things, but only by copying nearly verbatim from guides and tutorials, and you have no idea how to independently work on a project, start from scratch, or interpret reference material (e.g. cppreference)
The only way to learn that is to do it.
You can use a person or a chatbot as a sounding board to help orient you, but try to limit reliance; I suggest rewriting something you've already written, but without looking at the source code or the tutorial and don't copy any statement or chunk of code verbatim.
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