This Soldier Is Not Serious

The protagonist's intelligence is not very high. Although I know that the author should match the character of the protagonist, but can I gradually gain some enlightenment in the academy? For example, I learned a new mirror while reading a book, so why can't I try the same thing next time?

If the protagonist has always been like this, he is a complete idiot. Now it is okay to write a few chapters like this at the beginning and then it will be cool if he continues like this on the shelves. Also, replace the protagonist's wooden stick with the One Piece iron mace short stick