Qsynth is available for windows too but an older version https://github.com/JoshuaPrzyborowski/Qsynth-Windows-Builds. I used it Midi_cc to select bank and qsynth
but again no software can play as a realistic pianist even the worst pianists :-). You can record a real pianist playing via a midi keyboard and get the result into a midi score. But Sonic Pi is not made for that.
So @vinodv i encourage you to start learning piano ! it’s a lot of fun and work but you may one day play Debussy and be proud of yourself. There are some electronic piano around 600 € to begin if you can’ afford a piano.