Arm implant

I’m currently trying to find the best birth control for me and my situation. I am an extremely forgetful person by nature therefor I’m pretty sure I don’t want any kind of pill. I’ve been seriously looking into the arm implant, and I’m pretty sure that’s what i want to do. I would like any kind of advice or information on it that you may have. I’m 17 and the primary purpose for me would be to prevent pregnancy.