Hey,
Get the actor forward vector from hands? or get the actor forward vector based on hands rotation? 
Im not sure understand properly, but i assume you want 4 players in 4 different side of the table like how we sit at a real table…
If this is the case actors should be rotated and his forward vector and right vector is close enough to know from where to where you need spawn those cards
Here is some explanation about direction vectors:
https://www.youtube.com/watch?v=O-zEzdwcpuc