I'm trying to find some decent tutorials that actually make some sense but as yet I can't find anything that doesn't charge money or doesn't rely on a previous knowledge of previous illustrator versions. All very annoying.
It takes some getting used to.
Click somewhere to set the start point.
Then you can keep on clicking about, but that'll only give you straight lines between the points you've set.
The beauty is in the curvature you can give the points, by clicking and then dragging your mouse.
You'll probably know what I'm talking about.
The curve will affect the line you've just created and also the one after,
but if you'd like the curve to stop at the point you've created,
simply click the point again after you've set the curve.
I'm hoping that made sense.