Food, sleep and training first. Then a conversation.

In adults, creatine monohydrate is one of the best-studied supplements. In teens, the research is very limited. Under 18, food, sleep and training come first, and any supplement is a decision for you, your parents and a doctor.
P Evidence: promising. Good studies, but small or few. Use it and keep checking.
Jagim & Kerksick 2021 · Jagim et al. 2018 (reviews).
Not medical, legal or financial advice.
In The Ecosystem every framework comes with a daily action, a room that checks in, and the full library.