there are options you can do for the Minor 11th
one is you can do the theory that i show you that is take the 5th degree of the flated 3rd of the minor chord which the flated third is a major and play the 5th degree as a major chord
For Example
the C minor chord is
CEbG
now how to make a minor chord is flat the 3rd of a major chord
For Example
CEG (when you move the 3rd down a half step it is a minor chord CEbG)
now the flated 3rd of the C minor chord is Eb which is a major so really the 5th degree of Eb is Bb so you play a Bb with the C minor chord.
For Example
CEbG/BbDF which is a Cminor11th
another option is you can break it up.
While you are holding your sustain pedel play CC
then play EbG/BbDF and you can invert the Bb major chord to create different inversions of the minor chord and release the sustain pedel
you can also invert the Bb major chord as an option.
I hope you understand what I am saying because I not too good at explaining stuff about this. Hope this help.