Finding your voice in writing is not as easy as it sounds. The struggle to not force it can be overwhelming. I think the trick to finding your own voice is to remember that you are as unique when writing as you are when speaking. Most of us don't analyze everything we say as we are saying it but as writers we tend to do that very thing. Don't crush your own distinct voice by analyzing it in your writing. Don't try to force yourself to sound like someone else.
You have your own experiences that have colored the way you see the world and letting that flow into your writing will give it that distinct voice that only you can deliver. Don't over think it. Let your voice speak and the words will flow. Your writing will be honest and true, not stilted and forced. You might not have the voice of Hemingway or even Stephen King but your voice will be yours alone. Unique and special because no one else will have that particular quality.
And that's not a bad thing at all.