The pill?

So I've just been put on co-cyndrinol and I have some questions

Firstly when do I start taking it? I've heard so many different things and my doctor was rushing me out the surgery (it was really busy) so I never could ask.

I was put on it for acne and PMS symptoms but I'm wondering if it's just for that or it is a use of contraception aswell? Not currently active (Im a virgin) but I might start soon. I'll be using a condom aswell regardless but I'm wondering how effective this specific one is.

What's anyone's experience with this specific one? Weight loss? Depression? Heavier periods? Etc... I know everyone's different but still nice to get an idea