I also recommend a milder version, a stepping stone, before jumping to SICP, Simply Scheme. The book is available online for free[0] [0]:https://people.eecs.be

I also recommend a milder version, a stepping stone, before jumping to SICP, Simply Scheme. The book is available online for free[0] [0]:https://people.eecs.berkeley.edu/~bh/ssch1/showing.html https://people.eecs.berkeley.edu/~bh/ssch1/showing.html