Earlier quoted context omitted.
Same here! Started learning self hosted k3s, with terraform and IaC and all the bells and whistles. I would never have had the energy to look up how to even get started. In three hours I have a cluster.
Doesn't sound like you learned it, sounds like it did it for you, using you as the tool. IOW, can you redo it by yourself? If you can't then you did not learn it.
Knowing the abstract steps and tripwires yes, but details will always have to be looked up. If just not to miss any new developments.