Listen carefully and hear me out. Do not use Google Spreadsheets as a database. It’s not designed to act as a database nor is it a valid replacement for any current standing databases out there.
Luckily, Google has a database service that’s called, “Firebase” and is NoSQL. The entire interface is web-based and is incredibly power with a short learning curve. There’s also an API someone made on Roblox that allows you to interface with it.
Other options like SQLite, PostgreSQL or MySQL will require a RESTful API in order for Roblox to interact with it (utilizing HttpService). Whilst these options are considered industry-standard, it requires that you host your application on a server and for you to understand complex fundamentals like auth, etc which many may find tedious to say the least. However, this gives you, as the developer, a far more powerful toolchain which may have its worth.
Hope this helps!