A basic search brings up what you need to know.
But, I can help you as to how they recruit from my country, although I believe its pretty much standard, and if anything has become tougher.
First off you apply to a recruiter, and they do various Skype/phone interviews before you even talk to
DCL. When I started they were asking for a relevant degree or similar (similar because they recruit from all over, e.g here, childcare works in levels, through a degree, after three years you're automatically a level 6, the highest is 7, but a basic childcarer just needs a 2, but its is possible to work up to those levels without a degree doing various courses, anyway, off topic)
As well as that they want at least two years of relevant experience, mostly that comes through camps or teaching, I was a manager of an out of hours and holiday scheme.
As well as this you have to have 6 references (4 professional and 2 personal, but the professional ones have to be from different places, so again that means you have quite a lot of experience).
Basically, if someone wanted to travel the world and thought they'd do the kids clubs because it was easy - its not going to happen. You have to prove you know what your doing, that you can deal with kids and have an idea of how they work, that you know how to talk to parents, that you can entertain 200+ kids at once.
Once you get onboard you then have a weeks training through HR and your department in the company and the job, all this is the written down stuff, the policies and procedures, first aid and epipen training, and during this time you won't really be on the floor, its mainly done backstage.
Then after that you have a week's intensive training on the floor with a training counsellor, so you're doing everything but your not even counted as a person in the ratio, you cant be left alone, your literally a shadow, then, after all that you start work as a basic counsellor on the floor.
I applied over 4 years ago, and honestly the application process was the most stressful part.
I think it has got tougher since, I have a friend who tried to re-apply, they worked for two years then left and after a year wanted to go back, they didn't even get the first stage and were told that they were pursuing more qualified candidates at that time, so even two years of doing the job doesn't make you qualified haha.
I think Disney are quite picky who the employ, simply because they can be, most people I worked with wanted to work for Disney more than work on a ship, and Disney is seen as the best for crew.
When I applied I did my research. I wanted to work on a ship, and thats how i discovered DCL, I never thought Id get it because its Disney so also looked at others. The reason I went with Disney was because (at the time, and still pretty much now), they were the only company that had a website dedicated to working at DCL, they didn't hide anything, they put across the good and bad, what was expected and what you got in return.
At the end of the day, if you're not good enough, they will get rid of you. Disney can terminate any contract at any point, without and reason or warning, and Ive seen it happen.
I went on way to long, but I hope that helps.
If you didn't get the answer you wanted or have more questions, I can try and answer them for you.