First news item
Don’t worry about sounding professional. Sound like you. There are over 1.5 billion websites out there, but your story is what’s going to separate this one from the rest.
Second news item
It all begins with an idea. Later will take care of itself. It always does. It all begins with an idea.
Third news item
Be clear, be confident and don’t overthink it. The beauty of your story is that it’s going to continue to evolve and your site can evolve with it.