how do i get rosetta 2 without having a message pop up asking me to download it!

The very first Intel application that you run on an Apple Silicon (ARM) M1 Mac will request, and if you agree, install Rosetta2 for you. Its a one-time deal, and then you are done. No further pop-ups about this task. Takes only scant seconds. Again, with that ARM hardware, you can also install from the Terminal:

softwareupdate --install-rosetta

That will present a license agreement, and then install it.

If you need Rosetta 2 I assume you have a new M1 MacBook Air, right?

You should already have it with macOS, but if not, take a look here If you need to install Rosetta on your Mac - Apple Support

Hope this helps.

When an App that is installed on the computer is activated ( Opened ) by the user AND it qualifies for using Rosetta 2 the Big Sur macOS will prompt the user via the popup-up alert to install Rosetta 2. This is perfectly normal and expected.