Song Shuhang was exceptionally adept in this regard. Unless he entered the dreams of the Scholarly Sage and experienced the Sage's entire life in meticulous detail from beginning to end, acquiring all of the Sage's knowledge, he would establish a solid foundation for his cultivation practice.
Otherwise, with his current understanding of cultivation, mastering complex spells was merely a pipe dream.
Knowledge must be acquired gradually, building a solid foundation step by step. A crash course simply wasn't feasible for him.
In fact, Song Shuhang was eager to learn, and he didn't dislike studying. He was even a top student who loved reading books… However, time was not on his side.
More critically, Song Shuhang was currently without his head, and there was a network delay between his body and his head, rendering his learning ability effectively -1.