If you have an interest in synths, you owe it to yourself to read Synth Secrets by Gordon Reid. Published in 63 parts in Sound on Sound magazine, it remains the definitive tutorial on synth programming.
These are pretty technical articles, but absolutely amazing in terms of content. I remember reading them nearly 20 years ago when I first got into using synths.
https://www.soundonsound.com/search/articles/%22Synth%20Secr...