Using Google Sheets DataBase Automatic Bidding

I am trying to embed a couple of functions on my website. This is an Auction website on Ionos. The idea is to allow people to bid and send the bid to a google spreadsheet, at the same time the current bid is displayed. To date I have been unable to display a single cell, I end up with the whole spreadsheet being displayed. If you take a look at
https://www.infodial.co.uk/british-silver-coins "Current Bid" & "Bid"