That was an example but it could be woo.
Go down a level and find a class or collaboration group on the object level thing you want to do.
That’s not realistic advice. You can’t simply take a single class because you’re interested in it, if you do so you have to take the whole time-consuming package of other classes that you may or may not be interested in, the class could be another year. Usually you do it because of pressure or you have to take the chance that the credentials are useful for something.
There are specific exceptions, one that I know is foreign language. I know people who’ve been 4 years on foreign language courses and haven’t learned it. I suggest reading an actual book written in that language then looking up what you don’t know. I know this works because I tried it, not that taking one semester of class first isn’t good. But nope, maybe another class is better. Hmmm.
I’m talking about classes where teachers cover the topics and occasionally there are movies. Even in a class like this, the success rate of it is low, unless one has real experience on their own (self-learning by books, traveling abroad to where they speak that language). Reading a book in class and outside cannot be compared. The teacher has to specifically assign a “book-reading” class then read out loud for a class (that will cover… a single chapter per lecture?) and the material they choose is usually something artificial they made for the course… it’s not comparable. You say these classes are effective. I don’t believe you.