I think he was referring to the possibility that you would need to enlist, and have a certain amount of time in service or rank before you can go PJ.
You may not though. There may be the ability to come in on contract to go straight to schooling after basic training. Granted, if you can pass the screening.
Pretty sure the pipeline is about as long as mine was, so probably looking about 18 months of schools outside of basic. Things like an indoctrination/basic course, jump school, combat dive and dive medicine school, SERE, SOCM, etc. Be prepared to have gaps between classes too where you wait to class up. Which can extend your training time even longer. A lot of these schools will be with the Army, such as airborne and SOCM.
Airborne is easy. Your first indoctrination course (whatever they call it for PJs) will most likely be the hardest, followed by combat dive and any other that may relate specifically to PJ. The hardest I don't want to say mentally, but education/intelligence wise will hands down be SOCM.