Kindle case or sleeve ?

I love my kindle a lot. I've had it for a couple of weeks and can't seem to leave it. I'm traveling a lot and i don't want to chip or scratch it in any way.

-> i'm asking for your recommendation on keeping it safe but maintaining its lightweight. What are some useful things i can look for in either a case or a sleeve? Just overall any recommendation based on your experience.

I own a basic Amazon Kindle 11th generation.

Also, since I'm a new user, any and all random/unrelated tips and hacks for a better experience are welcome.

Thank you!