How safe is the Erbium laser and what are the long term risks? I.e. scarring, hyperpigmentation, etc

I’ve been using ClearLift to lighten my acne scars and it has helped some, but I’ve gotten a few consultats for erbium for more dramatic improvement. I’d mainly like to fix the hyperpigmentation from the acne scars, but I do have some very shallow scarring as well so erbium seems like a good fit. However, I’m very concerned about long term scarring or pigmentation so I’d like to learn more about the risks. Are there things I can do to prevent complications? FYI I am a Caucasian woman. Thanks!