My hands and fingers are jealous. I bought some cheap little cigarette roller thing for when I want to roll some. It does a pretty decent job actually.
Dude, it's not easy at all. I had to start again because the first one wouldn't close properly. My shaky fingers did not do an amazing job at the second attempt either, I'd argue :D
Doesn't sound like a bad idea, the cigarette roller thingy
If you're struggling, you can try to roll the cone first and then pack it. I'm a complete klutz and that's what I did when I was smoking. With time, you'll become comfortable enough to roll "conventionally".
The problem with it not properly closing is usually that you packed it too full btw.
You'll get it after years and years and rolling thousands. It'll be normal. Then you can move on to a reverse or inside out joint. I don't even know how to call it. Just flip the paper over so the glue is on the outside bottom, now when it's rolled there will a bunch of excess paper you can burn off. Makes a better tasting joint because you're using less paper. And when you burn off the excess, if you turn the joint just right, you can light the joint too. People will think it's amazing.