Will I have to wait Inbetween......?

You will probably wait after AIT to go to Airborne. That should only be a couple week wait though. Here is the kicker though. Once Airborne is done you go to RIP where you will be put into the program. You normally have to become an E3 and wait a while in the RIP program before they let you go to Ranger school. So in that sense there is wait between Airborne and Ranger. This wait is good thing though and will prepare you for the rigors of Ranger school and the Ranger Regiment. Rarely in your career will you get to go from one school to the next without waiting. there are times though but I do not think this will be one of those. Especially with your unit already selected. Hope this helps and keep your goals in site. Good luck and keep up the hard work.