There’s plenty of material out there to help you learn about wine, including several formalized courses. Now there’s something to help you learn about how to learn about wine: Marieke van der Gulick has written a well-researched guide to wine education, taking you through all the major qualifications available, the learning processes and what you can expect from each:

https://rackandreturn.com/the-definitive-guide-to-wine-education/