You and your family have my condolences on your loss. There is no way to make anything positive about this tragedy, except to accept (hard as it may be) that God had a better purpose for him "up there".
Time is key here..... After some time passes, the stunning grief will pass, and after more time passes, the pain will lessen for all of you. There will come a time when his loss is not the only thing you keep going back to, and after even more time passes - you will finally have a day when you don't think of him.
That's NOT meant in a disrespectful way, or to minimize your familys loss! It's just that your soul has healed, and your brother has given way to what is important now - Your Life!
I remember back in October 1990, I found my Dad lying in bed, dead. A good lifelong friend - I can unashamedly say I love this guy - gave me that advice about time. It helped for me, and I hope you can find some comfort in it.
This forum may seem a bit rowdy, and even (dare I say it) uncouth at times, BUT you'll never find a finer group of people willing to help a friend in a time of need. I think I can speak for everyone here, let us know what you need.
Prayers have already been said - I know this, because I said 'em! I'm not the only one....
Peace.