New to 3D printing - Trying to setup Prusa Slicer on my Mac  

New to 3D printing - Trying to setup Prusa Slicer on my Mac

Hi all, I think I need a little hand holding here. I just got my first 3D printer a few days ago. Sorry, it's not a Prusa, it's an Ender 3 S1 Pro. Hope I can still post here.

I downloaded the Mac version 2.4.2 and I did not see anything for my Ender 3 S1 Pro, so I chose Ender 3 V2. I was reading that I need to make some changes to it for it to work right but I don't understand what to do. I think I need to change the bed size and maybe the extruder settings or something? I don't want to mess anything up. I am in the "Printer Settings" tab at the top and I don't see anything to change nor do I know what to change it to even if I found the place to change it! I would love some very basic help in setting this up for my printer to get me in a good place to start. I mean like "Click on the 'XXX' button then type '123' into this text box" sort of help. Did I choose the right printer settings to start with? Is there a way to install actual Ender 3 S1 Pro settings?

As an aside, I first downloaded the Creality slicer and used that to print a fairly stringy Benchy and a pretty decent radius gauge from Thingiverse. But I hear people say the Creality slicer isn't great and I thought I might as well start with something better. Prusa Slicer seems like the way to go. 

Thanks for the help