These are my characteristics: very patient and forbearing, careful about small points, and I always pay attention to details , I don't know what field of study is best for me in university.

Those are your characteristics but what are you interested in? You can be the best suited to a particular trade or study in the world but if you don't enjoy it it's not worth doing.

Those attributes would serve you well in a number of fields... medicine, architecture, teaching, to name just a few.

As templelane said, consider your interests as well... do you have any passions, hobbies, things you find that you enjoy learning more about, etc.

One idea, if you find you are on the computer a great deal... are there any particular areas you tend to go to the most? This may help you determine an area of interest to narrow down the prospects.

I AM CARING,A BIT SMART,not fast thinking.