I am 26 and have just arrived in Singapore (5th May) and have to be honest, it is not looking good for me! Hopefully you will have a bit more to offer than I do, a diploma good 'A' levels (too young for a degree?) are very helpful as is a second language (Chienese,Japanese or Malaysian are the best)
I would let that dampen your spirit though!! There are jobs here, I just haven't found one yet. Would advise getting your CV/Resume onto a disk and having about 50 copies on paper then send it to everybody who is advertising even before you arrive.
Good Luck, You will love it here!!!