I had to make a presentation for the University, class—well I, it was a mess.

I slept 4four hours in two days in order to prepare for it, but it wasn't enough.

But for some reason, I don't feel sad or dissappointed.

I feel that I have to work harder to know the theory and the practice requerired in the real life.

Because aAt the university we only learn from books, and for that reason I didn't feel prepared to face the real world.

Now I have discovered the key to being more prepared for my futures jobs.

I had to make a presentation for the University, well Imy class, but it was a mess.

"For the university" sounds like you presented to the entire school. If you are only making a presentation for a class, be specific!

I feel thatas though I have to work harder to know the theory and the practice requeried in the real lifeunderstand the real world.

"to know the theory and practice the required" is unclear. You want to work harder to understand how the real world works, so we'll say this instead!

Because at the university we only learn from books, and for that reason I didn't feel prepared to face the real worldreality.

Making it flow a little better and adding casual context.

Now I discovered the key to be more prepared for my futures jobs.