That's kind of what learning to code is like, though. I assume you're using an llm because you don't know enough to do it entirely on your own. At least that's where I'm at and I've had similar experiences to you. I was trying to write a Rust program and I was able to get something in a working state, but wasn't confident it was secure.

I've found getting the llm to ingest high quality posts/books about the subject and use those to generate anki cards has helped a lot.

I've always struggled to learn from that sort of content on my own. That was leading me to miss some fundamental concepts.

I expect to restart my project several more times as I find out more of what I need to know to write good code.

Working with llms has made this so much easier. It surfaces ideas and concepts I had no idea about and makes it easy to convert them to an ingestible form for actual memorization. It makes cards with full syntax highlighting. It's delightful.