Try SICP at some point, no matter what else you learn.
HtDP is also worth taking a look at, and is much easier than SICP.
LLMs will mostly statistically plagiarize code. (Some people will rationalize "The tool generates the boilerplate, so that I can focus on the harder problems, because I am a mental giant who is above mere coding, and this is totally not open source code laundering", and then slap the code into a Git commit with their name on it, while making "cha-ching" cash register sounds.)
Instead of LLM, if you want to learn from other people's open source code, you can just read it in the original form (and not pretend you wrote it).
You can also practice writing your own code. Find things you want to do, and instead of using an LLM or Googling for something to copy&paste, work through the problem yourself, and build that understanding and mental machinery.
And when that starts getting routine, experiment with different approaches within the same language, as well as with different languages. You will add to your toolkit of approaches, and start to build up a feel for when they are appropriate, and various implications.
Advanced, once you have some basic programming skills: Start building things that have to work reliably and securely, have to be maintainable and evolvable at a good cadence, have to be done in the context of a team where everyone is working towards product success, etc.