I think the hardest thing about books like SICP, or the Knuth texts, for "casual hobby programmers" is the need to tear themselves away from thinking in the idioms of popular languages like Python, Javascript or (back in the day) VB.
It's almost like having a Zen master trying to teach you the principles of Zen using a special artificial language with simple but precise semantics, that you have to learn first (and understand thoroughly), rather than try to learn it in a conversational language.
It's a difficult task, but ultimately rewarding. However, it is a struggle to turn your mind away from Javascript when looking at an algorithm or a data structure being taught by one of these texts, and use the simpler semantics of Scheme or "literate programming".
It's almost like having a Zen master trying to teach you the principles of Zen using a special artificial language with simple but precise semantics, that you have to learn first (and understand thoroughly), rather than try to learn it in a conversational language.
It's a difficult task, but ultimately rewarding. However, it is a struggle to turn your mind away from Javascript when looking at an algorithm or a data structure being taught by one of these texts, and use the simpler semantics of Scheme or "literate programming".