@m1kel just wrote one for saml : Step by step guide to enable SAML with G Suite Idp (elastic cloud)
I haven't gone through it so I can't endorse it at this point, but maybe you can take a look and you could also let @m1kel know if you find anything that requires adjustments.
Other than that, feel free to ask any additional questions here regarding anything that is not obvious/clear in our docs ( that you referenced above ) - we do take feedback seriously and we will make necessary adjustments if something is brought up to our attention.