It is easy to find articles and guides designed for laypeople. If you know the right keyword, it is just as easy to find professional/expert level papers and articles. I have noticed that this is the case across fields. Is that what other folks experience? Where do you go for information when laypeople articles are too basic, but every expert level article is beyond you?
Textbooks! You can find textbooks on almost any topic that are aimed at undergraduate university students. It wasn’t until I got to college and browsed the extensive libraries for a few hours that I realized how much of the world’s knowledge is still in books.