Which plugins and settings best for the following effects?

Trying to add effects / plugins to GarageBand for making a soft instrument sound more like a real santoor. Below are plugins or effects I need you to find for me. Tremolo on release Vibrato Distorting the tone Shimmer Reverb (note or octave up or down reverb) ~ alchemy ? Octaver and if possible adjacent notes rather than an octave apart Drag across strings on down notes ( called glide ) Single note chord ~] Note repeater ~]. Arpeggiator ~]