Need Advice for Health Monitor Project

I am planning an Android Based Project. Basically My project is a Health monitor, I want to use Arduino and Bluetooth module for getting the statistics of health e.g calories, body temp and heart rate /pulse rate etc on my android device.
I am totally new on Arduino, it would be my first project on Arduino.
My question is that what model of Arduino will be suitable for this project and It will be grate if anyone also suggest me for Bluetooth module.
Thanks