What is the word used to represent the frustrating situation of wanting to find out about some topic, but not knowing the proper terminology related to said topic, and therefore being unable to search properly and find anything that actually relates to the topic?

It appears that the problem was experienced by Tom Scott in [this video](https://youtu.be/d99_h30swtM). Additionally, if my memory doesn't deceive me, I remember seeing the term in some youtube video a long time ago in the form of "a mountain of *(something)*", but I no longer remember what *(something)* was supposed to be.

Note: This may seem like a duplicate of [this question](https://english.stackexchange.com/q/215332), but it would be a more concrete term. The cause of this problem is not knowing rather than a mix between not knowing and forgetting, and the problem relates to not being able to learn about a topic rather than not being able to express oneself.

Edit: I now realize it might have been misleading to ask for a word, because I am not necessarily looking for a single-word answer.