i just got my letter of approval for my fiance visa petition. my fiance is turkish. I think what happens next is i send him a copy of the packet that i sent in with my petition, and an affadavit of support. the approval letter says i'll get another notice in 2-4 weeks, when the paperwork reaches the embassy. should i wait until then for instructions? or start mailing things to turkey now? i wanna know what to expect as soon as possible and get this thing done!

also, should he start preparing anything now? or should he wait for instructions?

Congratulations!! You should definitely start preparing. Take a look at the guides and see what you're going to require. The USC will need to get some paperwork to the foreign fiance for the interview. Also, while you're doing that,

Congrats!!

Congratulations !

Congrats!!! As already stated, take a look at the guides, they will help you determine how to proceed.

Congratulations!!!!

Congratulations!!!!

I would start reading the guidelines first and then start preparing for what will be required as others here have also stated.
Congratulations on getting your approval and Good Luck to you both!!!