Is there an overview of codes I can use?
Yes, there is a document that contains some of the most common special characters. You can find it here.
The https://help.clausebase.com/kb/special-symbols/ page only has shortcuts for other languages, could we please have these for the english keyboards especially the section symbol? Searching online, the guidelines only seem to be available for keyboards with a numeric section on the side which isn’t the case for most laptops.