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I switched over to Common Lisp, so I don't really have any personal recommendations for Scheme, but this site was useful for learning CL and it also has a section on Scheme: https://www.linuxlinks.com/excellent-free-books-learn-scheme...

The linked site's text comes from this source material: https://mitp-content-server.mit.edu/books/content/sectbyfn/b...

So you can continue to explore the rest of the book for free (without the aid of the built-in interactive interpreter). Check out Racket and its included support for the particular Scheme used by SICP: https://docs.racket-lang.org/sicp-manual/

Here is another online SICP with built in interpreter.

http://xuanji.appspot.com/isicp/

That one seems better!

Edit: wow, it even predates my attempt: https://news.ycombinator.com/item?id=4860370