The first joints I had weren't so good but some of the joints I smoked i just pre rolled them with a pen then packed weed into them, noobish i know. But anyway the key to rolling joints really is your weed. If you have weed that is too dry it is going to burn too fast and probobly be more of a bitch to roll. Also you want to have the weed your smoking nice and grinded up, if you must use your hands like I, make sure there arent any big chuncks or large amounts of shake when you are going to roll because that will mess you up. If you can get some somewhat moist/not bone dry weed and break it up nice and evenly when you start to roll it in the joint it should take shape a lot easier. Make sure the the cylinder you form with the weed by rolling it back and forth is even or else it will be even harder to roll.

You'll get it soon no worries.