anyone tells me how to use the spreadsheet function on here? Does anyone have any tutorial videos?
I suggest you to use App Helper Spreadsheet Extension v12 it more easier then stock Spreedsheet component, Here is the video tutorial you can follow: Tutorial 1 How to connect Google spreadsheet Extension with Google sheet in kodular,App Inventor etc - YouTube
You can find all of the tutorial for each block you want to use in the channel I mentioned
< Mark it solution if it’s helpful for you
I am sorry I am never use that 
Please use and guide me please.