Here's a map of all the standard procedures and syntax in R7RS-small I
did quite a while ago, but forgot to post:
https://misc.lassi.io/2022/map-of-r7rs-small.html It groups similar
procedures together and exposes symmetry, which I find makes things much
easier to grasp.

If anyone is good at HTML, TeX or similar, a prettier version would be
much appreciated.

You might want to do a similar one for -large eventually.