https://learningmodular.com/glossary/
This is a great one-stop-shop for learning about the terms used in modular synthesis. I recommend, if you can, reading it from start to finish. Not everything will stick the first time, but when you see terms come up later, you’ll remember that the definition is here somewhere and can refer back to it.
As for Audulus in general, have you checked out @Robertsyrett’s videos? They’re exceptional:
https://discourse.audulus.com/t/so-you-just-got-audulus-what-now/201
His series on nodes is also super helpful:
https://discourse.audulus.com/c/learn/node-tutorials
You can also refer to the Audulus YouTube page here:
There’s a ton there, especially in the long forms of livestreams.
All in all, it’ll be easier to give you help if you’re more specific about your goals. Do you want to know how to use X kind of module, to create one yourself?, to do a certain type of synthesis? Once you know more, we can take it from there - it would be great also if you can start another Help topic about this rather than continuing the conversation in this thread since this is more for discussion about the link described 