Advice for using this variety of douche

So for the longest time I used a douche with a thin, hard plastic nozzle. But recently some friends mentioned they used the pictured douche which has a much thicker but softer nozzle. It also sprays to the sides to prevent the water shooting up too high.

I have a couple of questions - how deep should I be inserting the nozzle? With my old one because it shot water straight up, the depth wasn't an issue. But with this one I'm having a bit of a problem with water trickling out my butt. It's possible I'm not pushing it quite deep enough.

And the nozzle has a slight curve. What direction should that curve be facing? Towards my stomach?

Thanks for your help!