Naturally, like most others it all began with video games, however quite soon I began to wonder what makes a computer tick, and after grasping the basics - how is possible that a line of simple ones and zeros could result in something as complex.
I removed the first punctuation which is not necessary. I think the last part should be taken into a new line because your sentence sounds a bit crowded. This is your opening sentence and it should come with a punch.
I must say I absolutely loved it to this very day
Soon afterwards I began developing my other interest - I picked up a musical instrument, I became more involved in extracurricular activities and began playing baseball.
.... this idea appears suddenly and it looks a bit abrupt. You should set up a proper link between the previous sentence and this one.
You have answered a very little in respect of how AUBG would help you broaden your global perspective. I think you need to have more emphasis on that !