There are loads of free VST plugins available just google......then mess around until you find the sounds you like. You will however need a MIDI keyboard an interface and some DAW software to help edit the MIDI tracks generated by your keyboard...try Reaper as a starter. You can however buy Cubase or Protools if you are serious, want the best and have lots of spare cash. Beware though most of these programs have steep learning curves are not user friendly for beginners and require a lot of tech know how.