Thomson TG585 + Pfsense Home Setup

[zoe]

Hello Everyone

I hope i'm posting this in the correct category and if not please excuse me  :)
I have a Thomson TG585 and i decided to install pfsense in a Zotac Zbox Id18 (1 onboard gigabit NIC + usb gigabit ethernet ) in order to finally add security to my home lan and also play around a bit

Connectivity

Thomson Gateway port 1 (no WAN only 4 LAN ethernet) cable to WAN (onboard NIC)
LAN (usb ethernet) cable to switch where i have all my devices connected

The WAN interface gets a 10.0.0.1 ip from the DHCP of the thomson router. The gateway to internet from thomson GW is 10.0.0.245
The Lan interface has a static assignment 10.0.1.1 and a DHCP enabled for the rest of the devices in the local network

Out of the box this setup works like a charm and i have internet!I will continue checking the above configuration cause after the installation both wireless and wired network is slower than normal but i'm not sure yet

Question 1: Is the above setup correct? Any advice will be very helpful

Question 2: Does it matter which NIC is dedicated in WAN/LAN in the pfsense Hardware? Is it better to assign LAN to the onboard maybe?

Question 3: Even though my wan and lan are both managed by the pfsense, the Wireless is still managed by the thomson router. And i don't know if i should add it "behind" the pfsense or leave it like this and keep the wireless isolated..

Thanks in advance for the time and patience