Please check me if my NATing logic is correct

I don't know much firewall, but need to NAT the IP address of a single device.

Got a hold of a Fortinet 60D. It has the following ports on the back: 1- 7, DMZ, WAN1, and WAN2

For this test I just want PC1 to have a natted IP address and be able to communicate with PC2.

All in my lab/local. No internet/ISP involved.

Does this make sense? Connect a PC to Port 1 and another PC to WAN1, like this:

PC1 --- Port1 [Fortinet 60D] WAN1 --- PC2 

Will this work for my basic test?

Am I on the right track here?

Thanks!