I would personally do the following (with Winbox starting from stock configuration):
1. Connect to a LAN port of the RB2011 with cable
2. Exclude the Wi-Fi interface from the bridge - Bridge -> Ports -> Delete the Wi-Fi interface
3. Include the Ether1 interface in the bridge - Bridge - Ports -> Open ether2 -> Copy -> Change the interface in the new dialog to ether 1 -> OK
4. Adjust which is the WAN port - Interfaces -> Interface list - WAN -> wlan1
5. Connect the Wi-Fi interface as a client to the Wi-Fi network of Home WiFi router - Wireless -> WiFi interfaces -> wlan1 -> Scan -> find the WiFi network and press Connect
6. Adjust the security settings of the WiFi client - Wireless -> Security Profiles -> default -> Mode: dynamic keys; Authentication Types WPA/WPA2 PSK (or other, depending on the security settings of the Home WiFi router)
If everything is OK with the security settings the RB2011 will connect to the home router
7. Enable the DHCP client of the RB2011 on the WiFi interface - IP -> DHCP client -> Change ether1 to wlan1

If everything is OK the RB2011 will receive an IP address from the Home WiFi Router and all of the clients connected to the Ethernet ports of the RB2011 will have an access to the Internet.