ok first off, I am going to pretend and actually give you a real answer!
First off its not an apartment its a flat, your in europe now not america.
The second thing is that decent job? You do realize that you need to get citizenship before you can work right? if not well SURPRISE!!! YOU NEED TO GET CITIZENSHIP! Citizenship can take between 4 and 9 months to do, and requires money to pay for the paperwork.
Now on to more money, if you plan on moving up there without even the littlest bit of furniture/utencils/appliances or stuff like that, and if you do then you will have a very very boring time in Amsterdam in the beginning. But if you do want to bring something it will cost alot of money to have it shipped to you.
Now I will answer you in a way that I really want to answer! You are so horribly unprepared its sick! First off do you know what the language is in Amsterdam? Did you know that there are a multitude of languages in Amsterdam? If not well understand that yes alot of people in europe know english, but they take that to their advantage and can take advantage of you!
Why do you want to move to Amsterdam? If you were above the age of 20 I would assume its because you want to travel? Meet knew people? or anything like that! But because you are not I assume its because you smoke or do something along the lines of that, plus the red light district prolly gets you excited! Well either way its a dumb idea to move there seeing as you have no idea what it even costs, details or anything like that....not to mention you are asking people on NEWGROUNDS!!! what you should do!! haha I love the people here but really getting life advice is not always the best thing that they can do!