How long until I get to fly the world???

[Cam Alder]

Hey all!
I have only recently commenced my training, and thus sitting my PPL theory in a few days.
But what I would like to know is that how long does it take to build up 500 multi hours and how can you do it. Also 1000twin hrs.

I mean it sounds great being quoted all these hours to get into airlines, but it doesnt mean much to me.

Based on a full time student/instructor, how long will it be.
One more thing, What age is the desired pilots' age for the airlines?

Thanks a lot!!

Cheers
Cam