First of all

, Satoshi Nakamoto didn't necessarily have to have studied information technology, right? He could have learned it on his own, couldn't he?

It seems absurd to think like this now. If you want to know more about Satoshi, there are many sources to know but naturally, curiosity will work within yourself to know about Satoshi at first. Which happened in my case.
However, if you think about it correctly, you can understand that looking for his biography is completely absurd. When he understands everything about bitcoin well and bitcoin can be used in a completely unrestricted way, Satoshi has been in the discussion since then.
From a technical point of view, Satoshi was already a good expert in this technology. He worked very well in implementing his ideas correctly and made them successful. He had enough knowledge of technology inside him, so he did not have to learn these things separately.