Birth Control Implant Questions

I know the implant affects people in different ways. Some girls don't have as much side effects or don't have any at all. But I do have to ask certain questions like...
Will it give me more acne or help my acne?
Will it affect my sex drive?
How long until I know the side effects are gone? - I looked it up and it said about a month or two
I just need a second opinion on this decision before I go and get it. I am 15 and going to turn 16 in 5 months. My mom knows about me being sexually active but doesn't want me to get on any birth control whatsoever. But this is my decision.