
One thing I've noticed with novice inkers, or artists for that matter, is that they go against the natural movement of their hand (as illustrated on the photograph on the left) when drawing curves.
Often times this creates wobbly lines and some frustration because lines executed in this matter are pretty unpredictable and can be hard to control.
Of course, if you've been working for some years you probably have been able to find ways and means to overcome this particular problem either through some new technique or sheer practice. For the novice, however, it will be good to start your artistic journey off on the right foot.
Anyway, back to the subject matter at hand...

When holding a drawing/inking implement in our hand and we draw a curve, the line produced from the movement should be emanating outward (as illustrated on the photograph on the right).
This is the natural movement we should follow.
The hand that grasps the equipment is attached to our wrist which acts as the pivot.
You will find that doing so creates a more steady and fluid stroke, puts less strain on your wrist, and could prevent such problems like
carpal tunnel syndrome in the future.
This is especially a big help especially when using a brush for inkwork which requires a greater degree of control to use as compared to a quill pen or a technical pen (though the aforementioned implements does present their own unique set of challenges).