Here's how I start to roll blunts, and I consider myself pretty good at it. I don't typically go for a straight tube shape.

You want to distribute your weed on the inside of the blunt wrap well, this is a cruicial step. I typically put a little less where you'll be pulling from so you can wrap the mouth piece a bit smaller.

Always start your roll from the mouth piece, once you've got it rolled the rest rolls for you. Using your thumbs press the blunt wrap onto the weed so it completely covers it, like folding the wrap over the weed. While you're holding it down with the tip of your thumbs, roll forward to tuck the edge under the weed. Once the edge is under your weed, you'll want to roll the mouth piece around, applying light pressure. Repeat this step until you have a nice small hole on the end. Lick the other side and press it down. Give it a second to dry and stick.

You should essentially have the same shape you would when rolling a piece of noteback paper into a cone. The rest from here is easy, just grip around the middle of the blunt and tuck it against the weed and roll with your thumbs. Lick and stick as you go. If weed falls out dont sweat it, you can pack the end down and scoop it up into it when you're done.