This set of instructions configures a fresh LEDE installation to run Homenet. They will likely work on a current build of OpenWrt.
There's lots of good info about Homenet elsewhere. See the External References section (below).
The general strategy is to connect your computer to the router's LAN Ethernet, convert the wireless and WAN interfaces to run Homenet, and test the changes so far. After things are working, configure the LAN Ethernet to Homenet through connect one of the (now Homenet) wireless interfaces.
- Install LEDE on your router. See the main Getting Started with LEDE page for details.