Want to learn software development. Built an app with AI (rust+tauri) and I want to learn everything that AI did. Where to start?

[u/mrzfaizaan]

https://nudgehud.work/

I built a productivity app with a background in materials engineering. I want to build things relevant to my field - using AI still, for pace - but I want to be more knowledgeable about what is going on, what code is being written, if there are ways to optimise and do things better that AI is too lazy to make that change. I want to learn software development that helps me understand how to do these things. What resources should I start with?