Can join the airborne then go to ranger school and if ped go to one of the regiments?

All rangers are or should be airborne. My suggestion is that you get exactly what you want put into your contract. Regardless of what a recruiter says it can be done and if they want you bad enough it will be done. Don't sign anything you don't agree with and prepare for a huge kick in the *** because these types of school are no walk in the park.