What i want to study/be (my dream)

Establishing some core values.
Reason why I chose my current school.
Reasons why I am leaving.
Some of the best things I have made out of it.
What I want to study/be (my dream)
Outlining how the new school can help me achieve my dreams.
Close it short and sweet.
I have written a draft and I need it to be rewritten in a well structured format with good grammar. Any irrelevant text can be deleted or replaced. I am not applying to one uni so it should be in a way, I can insert the various schools in it. it should be catchy like tellling a story, in short it shouldnt be boring. I am an international student and I am leaving my current school because of lack of opportunities and my huge class size. I need to talk about the new school more, I’m not sure I did. Something that could generalised it and describe some of the things the US universities may have in common. Also it should be something convincing rather an excuse. Thank you.