No one can tell you how to roll good. It's something that comes with practice, patience, and aquired skill.

The first thing you need to do is go to the store and buy a couple more. They're only like .50 cents each around here so I usually buy at least two. That way if you do fuck it up you can just shake the weed out and start with a fresh shell. Swishers arent too hard to roll and the shells hold shape pretty well, but the first time I tried to cut and roll a blunt I fucked it up royally.

If you cant find a fresh one, keep it overnight in the fridge before cutting into it and then make sure you really wet it down. Don't be afraid of it