Speaking of fashion, I consider myself that I am a fashion-conscious person because I have a knack for/ have a head for picking clothes. Fashion permeates in our [lives on a] daily basis, which is easily seen in every part of life. If my memories serve me right, my cousin is the one who has had an impact on my fashionable styles choices since I was a novice of vogue. In retrospect, I did not gain a deep insight into clothing. [it is unclear what happened that you did not gain an deep insight into clothing...why are you using "in retrospect" here?] Honestly speaking, [being a] fashionista is something I have been wanting to do or pursue chasing on. The first thing that springs to my mind is my invaluable knowledge gained from observation [it is unclear how this last sentence relates to fashion].

Hi Trisha, thank you for your correctness. It would be nice to learn a lot from you. It is so invaluable. In retrospect here means thinking back what I did in the past. I do not think it is good to use. Some sentences are irrelevant because I honestly just try to stick new SAT words within a sentence without understanding well. haha