When you are a little girl you almost never realize the true reason of why people never really were your friends or whispered mean things behind your back. However when you are a kid, this sort of things don't really make an impression on you.
I wouldn't use 'however' as a transition there for your ideas in the two sentences feel like more supporting than contrasting each other. Maybe somehow write them as one sentence could do as well. My suggestion is like this:
"The reasons of why people never really were your friends or why they whispered mean things behind your back didn't really make an impression on you as a kid"
With each year that passed, my abilities in drawing improved and my creativity developed.
With each passing year , my abilities...
With the complete support of my parents I started to submerge myself in the world of fashion and for the first time in years, it made me completely happy.
With complete support from my parents, I started to...
but I didn't know where exactly would I go.
where exactly
I would goThe satisfaction one feels when you see the physical representation of something that you have created with your hands.
I would say it is not exactly a finished sentence? 'The satisfaction' is your subject, but you're lacking an object here.
I like your essay. It really shows your passion for the arts and fashion. Good luck with your application! Hope I helped in any way, and would appreciate if you have a look at my essays :-)