Yes it does. Scheme is not what makes SICP challenging. The sheer density of concepts is. HtDP is a bit repetitive and gets a bit boring over time. While som

Yes it does. Scheme is not what makes SICP challenging. The sheer density of concepts is. HtDP is a bit repetitive and gets a bit boring over time. While some things overlap, I would recommend to first work through HtDP (or better through this online course https://www.youtube.com/channel/UC7dEjIUwSxSNcW4PqNRQW8w/about https://www.youtube.com/channel/UC7dEjIUwSxSNcW4PqNRQW8w/abo...) and then work through SICP - especially if you try to learn programming by yourself.