I don't know what to do in life
This is not a positive note to start... The admission guys may not find this is very pleasing. You need to show that you have a vision and when you say that you don't have a particular goal, that may be very disadvantageous for you.
I'm interested in a bit of everything, something Yale has.
You should have started with this.
I think you need to be more specific and say what you can bring to Yale.
Knight14 is right. Skim the most essential and present them in your response.