Forti NAC on SSID

Hey I'm trying to configure NAC on my wireless network but i cant make it work. It was easy to setup on a switch port (ex; cabling PC) but i cant make it work on the wireless SSID.

1-I want to move ANDROIDs to GUEST WI-FI even if they try to connect to CORPORATE SSID
How Should i configure FORTISWITCH and FORTIAP? 

What it means Switch Controler action VLAN? and Wireless Controler Action VLNA?

thanks