Here are some links to Scheme implementations and tutorials.
http://gambitscheme.org/wiki/index.php/Scheme
SNOW2? http://snow-fort.org/pkg/
ftp://ftp.cs.utexas.edu/pub/garbage/cs345/schintro-v14/schintro_toc.html
http://scheme.com/tspl4/
https://people.eecs.berkeley.edu/~bh/ss-toc2.html – Simply Scheme
https://www.gnu.org/software/kawa/Installation.html
http://www.shido.info/lisp/idx_scm_e.html
http://ds26gte.github.io/tyscheme/index.html
https://www.gnu.org/software/kawa/tutorial/index.html
More books online: http://www.bcl.hamilton.ie/~nmh/t3x.org/zzz/
http://gambitscheme.org/wiki/index.php/Main_Page – Gambit Scheme
https://www.gnu.org/software/kawa/index.html – Kawa Scheme
http://call-cc.org/ – Chicken Scheme
You’re welcome.