Help building a router

so i have a old computer and wish to make it a router. BUT i have little idea of what im doing. it has 3 PCI ports inside i know i need 2 NIC but i also want to have it send wifi so other devices can connect to wifi. what is everything i need (hardware) to make it a router with pfsense. Please suggest specific items because i really have little idea of what everything is. please help! (sorry if this post is in the wrong place)

this is compatible with freeBSD but there are probably cheaper ones, I got to head to work so I don't have time to find one cheaper