Not to derail the core message, but one learning approach I've enjoyed in the past is to come up with a list like this and then try to learn a little bit about

Not to derail the core message, but one learning approach I've enjoyed in the past is to come up with a list like this and then try to learn a little bit about all of them. Doesn't need to be deep knowledge, just a basic "hello world" or equivalent to get your feet wet. It's a lot harder to get breadth when you stick to technologies that solve a problem you're facing, so sometimes it's fun to just explore a technology for the sake of seeing what it's like. Maybe with a more solid basic understanding, you'll recognize a case in the future where it could be useful or where it would be fun to throw into a side project. Also, some technologies may stand out as more fun and things that you naturally want to dig into further. Of course, that doesn't mean you now know any of these things, but even some small experience breaks through a psychological barrier, from something intimidating and unknown to something a bit more tangible.