I'm not police or coroner but a close friend of mine hung himself when we were 18. I don't know the ins and outs, except that there was an inquest, an autopsy 
and the funeral was several weeks (about 5 I think) after his death.
Most of all I remember my incredible anger with him, blaming myself (why didn't he feel able to ring me?) and just being so unbelievably sad.
Let yourself feel whatever you are feeling. I remember being told I shouldn't be angry with my friend for killing himself but I was. And being told I was wrong for feeling that was very hard. Eventually (literally months later) I got over my anger and could see a different side to it but I needed to go through that.
I also remember feeling very alive and sad, e.g. when I heard birds sing (something I barely noticed before) I remember thinking that X would never hear them again, and once again not understanding what he'd done and why.
My best therapy was keeping a diary. I ranted and raged in it. I cried on it. I remembered my friend.
It's been 13 years now (almost to the day) and I still have moments of sadness. A song can trigger it (especially one played at his funeral which had special meaning for us). I have forgiven him though now. I know that sounds odd (because I was therefore blaming him) but I did need to forgive him and eventually I did.
I'm so sorry for what you're going through. Be kind to yourself.