1st time Air-force Enlistee wondering about Pararecue or other SpecOps?

I am interestd in joining the Airforce and would really like to go security forces. I am now thinking Pararescue would be an even more interesting path. I have been told by a recruiter that I can choose PJs or SpecOps @ MEPs in place of my other 4 choices if I qualify. I was also told if I go through training and dont make it for some reason that I forfeit my initial 4 AFSCs and the AF can then choose what I will do my remainer of time in for how they see fit. I was also told that If I go in as Securty Forces that I cannot apply, Crosstrain or tryout for PJs or SpecOps until my 3rd yr of service. My Question is: Does anyone have any first hand knowledge of what PJ requirements are? I am very interested in knowing if what the recruiter stated was indeed true or if there are any other options to get into PJs or if I dont p how I can reapply and when? Last question is: If I dont p is there any way to guarentee or apply for Security Forces?