Have you had a look at our 9.7 Indoor Access Point User Guide?
Setting up a wireless LAN on your standalone AP should be relatively simple.
Login with uid: super, pw:sp-admin, and from Configuration/Radio2.4G, click
Wireless1 tab, and define your SSID name/encryption/etc, and for the Packet
Forward option, use Bridge to WAN.
Clients who connect to your WLAN, will send DHCP requests on your WAN VLAN,
and should get an IP from the server that gave your AP an address.
I hope this is helpful.