Hi @TiredMia and welcome to the Quick Sight community!
What in particular about what you mentioned above are you having difficulty with?
What does your current dashboard look like and how is it not accomplishing what you’d like it to..that way we know where to start in assisting.
But to start, if you’re trying to limit the data being returned, I would suggest utilizing date parameters as those can help in limiting the returned data.
You can also explore this article, which talks about creating period comparisons.