You can try to get some tips from this video ))
Practice Chopin's Op. 10 No. 1 and the variants of it by Godowsky and Chavez.Mvh,Michael
About achieving soft touch and sound I would recommend to simply imagine every note in let's say beautiful quite and soft violins sound, and when you have a clear sound idea your fingers will follow your imagination and touch keys differently
One of the things that has helped me is to practice arpeggios very staccato. I had the tendency to collapse my hand while playing legato arpeggios (kind of like slouching while sitting down on a sofa), which put undue weight on my hand, effectively accenting every note my thumbs played. Playing brisk staccato arpeggios encourages the hand to be lighter and more even, at least for me, and once that is a habit, it makes legato a lot easier. I'm no teacher, but it has worked for me.
find that practicing arpeggios lightly and quietly helps me to play arpeggios more lightly and more quietly.
ikr Only problem is, when I try playing light and quiet, it translates to the piano as "wak and puny". It does not translate into "Mozart touch".