Why does the 'soft d' sound so different in my recordings?

I’m a pronunciation-focused learner who records myself daily, but I’m struggling to nail that light, almost silent 'soft d' in words like 'rød' or 'mad'. Whenever I listen back to my clips, it sounds way too harsh and stops the flow of my sentence. Does anyone have a specific technique for tongue placement, or should I just try to mimic the 'th' sound from English to get closer to the Danish mark?