Is it possible to change your job before basic?

i've recently decided to join the Air Force and after taking the DLAB and passing i listed only two jobs on my job list: airborne crypto linguist and ground crypto linguist. i already researched both jobs, i wouldn't have chosen them if i hadn't, but now i'm not so sure that is what i want to do. i'm in the DEP, i don't know when i leave for basic yet and i haven't signed anything final so it is too late to update my job list?