If you really want to know the answer to the question, Who am I?, you might try the following meditation.
Start with taking time to feel your feet - barefoot on the ground if possible. Notice the different parts of your feet on the ground. Feel your butt on the ground or in your chair. Notice the air going in and out of your nose. Notice the muscles you're using to breathe in and out. Say the words In and Out, silently to yourself as you breathe in and out, or picture them as you breathe in and out. Once your mind is fairly quiet, see if you can continue to breathe and feel your your feet and feel your Self in your body. Or perhaps be open to some sense of something Eckart Tolle calls the inner body. Don't try to figure it out. You likely won't be able to understand this with your thinking brain. Just be available to the idea of the feeling of it as you breathe.
Once you settle into that quiet-mind zone, ask yourself, Who am I? And wait. Breathe. Wait some more. Just wait and breathe and feel your feet, as best you can. Feel free to re-ask this question as often as it feels right. Just be careful that it's not with an energy of trying to get the answer. Asking and waiting in quiet space is enough. Simply notice what happens inside.
I cannot tell you how long this will take, how many times you'll have to do this process, but if you really want to know the answer to this question, it will come. And it will more than likely come in the form of a feeling or a certain felt-experience of knowing. It can't be forced, it doesn't come cheap, and there are no shortcuts. However, the peace and knowing that comes can be life-changing.
If you'd like some help with it, please let me know.