I look forward to hearing from you.
This sentence is not very helpful, and I think you should delete it.
Also, I think the first paragraph is not focused on the message you are trying to convey. That first paragraph tell them all about their program, but they already know about it. It really is better if you think of the most interesting or inspirational idea that has come to mind for you when thinking about getting involved in this program. Really ask yourself why it is meaningful for you and what you think is the best thing about the program. This essay needs to include at least one idea that expresses a THEME. What is the word or phrase that best expresses your motivation to join this program.
Another example of a place where there is no theme is this sentence:
Currently, I am studying General Management (M.A.) with specialization in Human Resources in ...and Entrepreneurship in Berlin and Stuttgart.----This is excellent, but you should revise it so that it expresses to the reader what this fact about you has to do with your ideas about how you will make a big contribution as a part of the organization.
If you read more about the organization, and think about your past accomplishments and greatest aspirations and talents, you will unearth the real distinction that sets you apart by making this letter interesting.
: -) Good luck! I'm sure they will be impressed with it.