Learning Scheme / SCIP

So I want to read SICP and learn functional programming. I decided to start with Scheme.
Which implementation should I use for starting to learn Scheme? It has to run on Windows but it doesn't need to be integratable in a IDE.

SICP is overly weak and complicated and was conceived in a time when computation was not yet mainstream or accessible.

Books like The C Programming Language are a much better attempt at trying to solve the problems SICP's authors first set out to solve.