I really like this one
I got it based on Wirecutter’s recommendation
https://www.nytimes.com/wirecutter/reviews/best-laptop-macbook-sleeves-cases/
In my undergraduate years I had a heavy 15” MBP which I kept in an ALUMINUM hardshell case. I still managed to make a dent in it so I understand your worries. But honestly, I realized 2 things. First, that was completely unnecessary and a sleeve like I have today would have served me fine. This is all the more true now when a lighterweight laptop like the MBA can do everything my old MBP did and more.
But second: I also realized my obsession with protecting my laptop was a result of my mistake of 1) overspending on my laptop such that I would have to keep my laptop beyond the 2-3 years of coverage with AppleCare etc. I have lots of bags so don't need anymore.
It was a miserable experience carrying that heavy thing around too.
My advice:
Don’t overbuy, especially today when for 99% of people a MBA (perhaps the model with 24GB and maybe 1TB ssd, perhaps, possibly) will be more than enough.
Plan to replace every 3 years, and get AppleCare and just use a sleeve like a normal person.
If you have an accident, AppleCare will be there. The sleeves will save you from most accidents anyway. Especially when combined with a padded backpack with a laptop compartment.
It is important for students today to not get too large a laptop because the reality is that many also will want to carry an iPad simultaneously. While it amounts to similar-ish weight to my old setup it can do more and having 2 smaller devices is much more durable than one gigantic fragile one.
Anyways, that’s my 2c. I am really confident today that this is the wisest route.
If my laptop breaks today I am not worried about replacing it financially even without Apple care, cuz it was $1500 not $2800 like my previous MBP.