If it is possible to take a leave of absence at your current gig, that would be the best way to venture into something exotic. I'm speaking from experience, when I came to Japan I jumped with both feet and I gave up my seniority number at my carrier, It's my nature to move decisively in any particular direction.
it worked out for me but it could have as easily not worked! Looking back at it, I would have just wait it out and keep my number, specially since I didn't have an immediate need to give it up!
Something to consider.