Suggested corrections.  Hope it helps!

What should I do?

I'm reading a very really useful book at the moment now . It's about polyglots phenomen and their different ways in which they of learning foreing foreign languages. This book is very inspiring to me. I want to change, develop my mind and learn more and more. After having read this book, Afterwards, it seems that everything is possible.

In spite of this, when my thoughts return to reality, I understand that, because of my laziness, I'm unable to change anything.  I can change nothing because of my laziness. I have enough time to do my homework for courses at the university, University's homework, prepare to for exams, read, and create things. However, there seems to be but something wrong with the amount of time that I have my time.   It just suddenly dissapears everyday, every week, every year, and this upsets me. I'm upset.
If people want to change, then they can simply do so, right? they're changing, aren't it?