I don't know anything about transfers but i was wondering whether you knew when you'll be sent for the six weeks training. is it immediately?

I look forward to hearing about how the training is scheduled/held. I'd call up the HR people immediately and ask them about transfers and other offices.  There isn't any harm in asking them.  Usually they have to contact HQs for answers but I'm sure there's no penalty for asking.  And you never know, they just might allow you to start at your preferred office. I was accepted for another position with them and asked a bunch of questions regarding salary and location and they simply responded with no judgments.  I ended up declining the position but hope to be considered for the IA position.