Microsoft has lots of info here https://support.microsoft.com/en-us/excel

I have kind of grown up with spreadsheets from many years ago and so have a number of sheets setup that I continue to use
but when I want to do something different I can usually find info at that site.
Or I get one of my kids who use it all the time to help me if they are home however that usually means they say just do this and that as they set it up and then leave me still unable to figure out what they did so if I need that feature again i have to learn for myself