Perhaps the question you need to ask yourself is "how will I feel in the future if I don't take up this opportunity now?"
I chose my nom de prune as a direct result of having been in your position 40 years ago, albeit with the RAAF.
It took two years before I regretted my decision not to take up the offer. And I've had 38 long years of living with that regret.
And before I'm jumped on for being a starry eyed romantic with no practical experience to call on, I found my regret was validated while watching my son go through the process to earn a FJ seat.
He is based in a very remote location in a very hot climate. (not the Middle East or Afghanistan) and he loves his job.