Im getting braces on my teeth,does any know how long do i have to wait to get the procedure done?

I just when for the consultation 2 days ago but im plainning to see other dentist for more opinions,but the dentist that i saw said that i have to go in two weeks to get some pics taken, then i have to wait a month for him to put them on! why do i have to wait so long? are others dentist going to tell me the same thing?