Putting Hardshell case on MacBook

I agree with John 100%.

Hardshell cases may interfere with the computer's ability to disapate heat. This is not good.

Putting anything on the keyboard may result in disaster much more quickly. There is, when the MacBook is closed, basically no space between the keyboard and the screen. If you try to put something in there, you will crack the screen.

Wash your hands before using your computer and don't eat or drink while using it if you don't think you can avoid spilling things on the keyboard.

For carrying the computer around, I would recommend a padded sleeve. I have a couple of neoprene ones that cost less than $10 apiece on Amazon. I use them when I'm not using a messenger bag or backpack that has a padded compartment.

No to all questions.

Do not use cases, covers, or "skins" on a Mac. Just don't do it.

Here is the post (and picture) I was looking for: macbook air 2022 cover - Apple Community