in the top five happiest countries in the world?
It is important to cite the source when you say something like this.
This is a run on sentence:
Well is not enough to believe that things will be better; it is necessary to make them better. ---I fixed it with a semi-colon.
And that is what I want to dedicate my life to. You know, I think this is implied. I think you can replace this sentence with a sentence about a concept very specific and meaningful to you, and central to the theme of this essay.
Let's make a small change here, too: Working on these challenges,
is where I want to
develop follow
the rest of my professional path.
I'll add "also" here: I can't think of a more effective way of inspiring others than sharing not only knowledge but also life experiences.---but actually, I think this sentence is not quite right for expressing what you are trying to express. I don't know exactly what you mean, but I don't think this is clear or poignant. The rest of the essay is, though! This really demonstrates good intentions and deep understanding.