Update value from external webpage.

Hello there.
Just started using databases in general. So, I am super new to them. I have created a database that I can search on an extra website.
To be specific. I have a database of Magic The Gathering cards that I own. The search returns a value only if I have a card within the search parameters.
What I am wondering/wanting is to add to the external website a way to increase or decrease the number of a specific card.
I don’t know if that is possible so I had no idea as to what to search for.
Thanks in advance,

I think that will require a raw embed which basically embeds the Ragic sheet into your website (not the embedded version), and they will be able to make updates to the records. With other embeds, there are no ways to make edits to your data.