Mash Manipulation like in real world?

Hello guis, I'm working on a project looks like realistic.I'm moving some dedicated parts of my 3D mesh with bone structure in it.But i need to manipulate the mesh like we touch the skin with finger and move it around.I need to move certain hair on light press and also need to move skin that is my 3D mesh on more pressure. I tried mesh deformation to move tries of my mesh within certain area with ray cast but can't get some realistic effect.I attached my code here.MeshDeform

please help me to get my goal.

thanks in advance.