Emirates is a fast expanding airline with very specific quality requirements for the people it seeks to employ. In many respects it is no different from other companies seeking to employ the best candidates for the positions on offer.
As you do not appear to be a UAE national, their cadet programme may not be an option. Therefore the best way to be in with a reasonable chance of finding future employment with them as your chosen company (I seem to recall it was Qatar last week?) is to work your way up to the postion where that becomes a possibility.
Do your best at school and obtain good examination grades preferably in suitable subjects. When you can afford to do so, or as opportunities might present themselves, train to become a commercial pilot utilizing programmes that are best suited to your goals and finances at that time.
Put in a lot of effort towards achieving your goals, but keep options open for when things do not work out as intended.
Work your way up through the employment opportunities that might be available to you on completion of your training.
One day you might then find that you meet the minimum experience requirements for the goal you have sought. You can then compete with all the other people who are seeking the same opportunity.
If you do all of this, and with a lot of luck, resource, determination, hard work, luck, and more luck, you could do all of this in maybe 10 years!
This answer holds true for almost every other company out there as well.