I don't think it's possible to jump right into meditation. You must expose yourself to doing it in short increments of time.

I myself don't do very well becoming aware of my own body. It makes me more uncomfortable. I instead become aware of what is hapening around me. The feel of what I am laying or sitting upon, any smells in the room, the sounds of what comes through the window, the level of light doing the same.

I set up the space too. Aromatherapy sets my disired mood, I find something comfortable to curl up with, a sound of the day (I can pick up the spa, calm, nature music channels on the tv), and I even select something to hold (like a small stone, shell or feather).

As such I guess it is that which is external to me I am mediatating upon.

Sometimes I admit it only lasts 5min, other times I have fallen asleep. One thing I do is write a few words in my journal immediately afterwards.

But, please, something to note is that there is no right or wrong way. Don't go in with the expectation of success as you first start out.