I know I came in kind of hard and abstinence-y, which isn't helpful, but I do know a few people that deeply regret their teenage acid use and feel like it was the catalyst for permanent, decades-long mental health problems. Not a full, permanent, psychotic break or schizophrenia but lifelong de-realization and dissociative episodes, that kind of thing. I also know many more who have turned out fine.
LSD in lower doses is arguably good for cognition as an adult, and likely even in higher doses as long you don't have a difficult trip that triggers mental health complications. It's not 'damaging' like MDMA, alcohol, dissociatives, or heavy stimulant abuse.
Until your brain growth has plateaued, though, the risk of scrambling your eggs is definitely higher.
If you're going to use keep the doses moderate and infrequent and don't dose when you run the risk of having to interact with teachers, parents, peers, cops. Once the switch flips and the trip turns paranoid or otherwise bad it's no good.