@Kristian, It’s all about exercise and grounding. I’ve opened this threat for tips and then learned it myself.
It’s about focus and grounding. If you control your energy there will be no more ‘out of control’. It doesn’t matter which hand you use. My experience is: In the beginnning yeah sure, the dominant hand will be more effective, because energy natural flows from that side. But when you practice and ground there will be no difference.
Here is an exercise I’ve made, just to get it under control, it even helps you ground.
Ground yourself with a Pendulum - Divination - Become A Living God