Casting to a newly created Actor... How to?

Hey,

fairly new to BPs. I’m trying to make a class system in an RPG - note that the player will party up with NPCs and fight old-school RPg combat style. I wanted to keep it clean, so I made new actors called “Mage”, “Rogue” etc, gave em stam, int, etc variables. Now I’m trying to access those variables from another BP but I have no idea how. I know I could put all the variables in the original character BP, but like I said, I wanted to keep it clean.

What do I cast to? Is there some sort of variables library I can make and do it that way? No amount of googling has helped me here.

Thanks in advance!