It´s impossible. I tried and tried and put god knows how much money to different lotions etc, to achieve that softer skin. When breaking up with my girlfriend whom with I was for 12 years, she screamed at me, that no lotion or cream will make me a woman.
After starting HRT and being on for a month, I kind of understood what she said, even when it was meant as an insult, she was right.
There isn´t anything in the world that will affect this body so, that it turns into more feminine version, with soft skin for example...other than HRT.