Ok, this is the technique I was shown when I first started rolling joints and couldn't quite manage them. First, break up your bud to a fine consistency being careful to remove all stems and any rogue seeds which may be present. Next take your paper and fold over a decent sized pocket at the bottom to hold your herbage.

Now take out a dollar bill and fold it end to end without creasing and rest the prepared paper in the dollar cradle you've created. Hold the whole deal in your left hand (or right hand if you're a lefty), gently like a soft taco shell while you fill the paper inside the dollar evenly with weed. Now once you have your product in the paper resting in the dollar cradle bring the whole thing in front of you and hold it in both hands as if you were rolling a regular joint.

Sort of rock the configuration gently back and forth while gently squeezing/pinching your fingers down towards the forming tube of weed at the bottom of the cradle. Peek in the end as you begin to roll with your fingers, sliding the front and back halves of the bill tightly against one another, thumbs moving upwards and fingers at the back moving down. If you've got the motion correct the shorter front edge of the paper will tuck neatly over the roll of weed and into the longer back half of the paper.

Continue the sliding/rolling motion until the joint is neatly rolled inside the dollar cradle leaving just the gummed edge of the paper free of the joint. Carefully remove the joint from the cradle being sure to keep enough pressure on the joint to keep the paper tight, but not split it. Now lick and seal. You should be ready to light that bad boy up and toke away. Enjoy your handiwork. I hope this helped you.
PS) Use a little more weed than you need at first because some may squeeze out the ends.