After I order a student version of Sketchup, how do I install it? I have just gotten an order confirmation email and no link to download it?

Do you mean you purchased an educational license for SketchUp 2022 Pro? If so you can download it from Download All | SketchUp Then follow the installation instructions here: Installing SketchUp | SketchUp Help

Please correct your forum profile. There is no SketchUp Make (desktop) 2022 version.