I think the main problem here is the excessive use of adjectives. You are using them, presumably, to show enthusiasm, but it doesn't read that way to me and some are over-the-top, like 'perfect knowledge'- the obvious question to ask is why you are studying if your knowledge is perfect.
I am a second-year Civil Engineering student at the Galway-Mayo Institute of Technology/I am in the second year of a BEng in Civil Engineering student at the Galway-Mayo Institute of Technology to be honest. reads better to me than putting in words like ambitious.
Fascinated with huge amazing- again too many adjectives for my taste- I'd cut a lot of these out to tone it down. You could say 'I have always been fascinated by mega-structures and other structural works, so Structural Engineering is a natural career option' or something similar.