Yeah, sharing is the easy bit, but I'm after the field-sortable function of Excel tables. I don't thing GS has quite the same thing. There's something called Pivot Sheets, but that's more of a filtering system I think.
Sheets has both sorting and filtering on columns, in much the same way as Excel. But I don't think it works on mobile unless you have the Sheets app installed. At least, I couldn't get it to work on an existing Sheet that I know has filters, just now.
Yep
https://webapps.stackexchange.com/questions/103843/how-do-i-share-a-google-sheet-with-read-only-permissions