Experience is something that comes with practice. These succulents and cacti were all about to die last year due to my carelessness. I have rescued them all. I had almost no losses, that's why I say and confirm that they do not require maximum care but rather something simple.
Sometimes when we torment ourselves taking care of them, it's as if they feel stressed and can't handle it.
Do they die?
Of course! You just have to know what they like, take note and let them grow.