Observing the boldness of Peter and John and perceiving them to be uneducated, ordinary men, the leaders, elders, and scribes were amazed, and they recognized them as the companions of Jesus. (Acts 4:13-21)
https://bible.usccb.org/bible/readings/040624.cfm
The disciples were not educated nor were they the powerful, but they were recognizable as companions of Jesus. Perhaps that is the only qualification necessary.