AI does improve learning by at least being a tool that can explain what code does. So unless you want to avoid it altogether, it is a good way to explain what a technology is good for and what the usual applications are. (LLMs are probability machines after all.)

If you want to avoid AI altogether, or learn in a more structured way, there still are tutorials and courses that teach a technology. For Go, you could check for example A Tour of Go. There isn't necessarily a need to read the documentation from start to finish, but the documentation pages usually contain an explanation of what it is used for and tutorials of common use cases.

If you want to know what kind of solutions a technology is good for, I would just google it. There are many blog posts and forums discussing the experiences developers have had with a piece of technology where you can learn more about it. These days AI is good for exactly this, though.