Army: Best MOS to eventually switch to Civil Affairs or PsyOps?

Currently neither of these MOSs are available for Active Duty non-prior service; you have to do your time and be either E-4 or E-5. Anyone know what MOS I should consider to increase my chances of switching over to one of these once I gain enough rank?

I’ll be going in as an E-3.

Engineers, Chemical, Patient Administration Specialist, Medical Supply Specialist , Wheeled Vehicle Mechanic, Machinest, Preventive MedicIne Specialist, Animal Care Specialist, Military Police, and Intelligence Analyst. Is what it is for the reserves or National Guard. They say there is none if your regular army.

With PsyOps the most important thing is getting a 100 on your DLAB.