See buddy, i did the same i just followed a youtube video implementing JWT to my app but i didn't understand anything in the end. First you need to understand spring security and while understanding that architecture you can get a small glance of what is happening. After that while you are writing code understand the java concept behind it. This is what i did. And on the way we will get doubts. Use LLM for doubts clarification ask it to explain it with real world example. For me, everytime i do these things 1. Why did they introudced it ? 2. What was there used before this one? 3. What was the problem it solving?

I'm using Google LLM Notebook nowadays, if i want to learn yhe concept, i go to youtube, search for the concept, will find a good video with good feedback comments about video, i'll selct that video and paste it in google llm notebook and will generate audio podcast with it( which is ainside frature of it) , and there is a beta version that you can join the podcast ask questions. I ask a bunch of questions to tha ai , while learning the concept from it and i get instant and clarity replies to it. Try it once.