Android Unity3d - create a mesh object with movement

I am creating an android application. The objective of my app is to show a mesh model(Men/women) with animation and also the user can able to change their mesh object's face dynamically.

I am new to this environment. So can you give me some guidance to start my app. I put efforts to start this and I got the following informations,

Creating a mesh object using blender tool and adopt it into the unity3d and change the face dynamically. Is is correct way to start this. Please give me a useful information?