Mini Router/PC with Raspberry Pi Compute Module 4, Dual Gigabit Ethernet NICs, 4GB RAM/32GB eMMC,

i have a Mini Router/PC with Raspberry Pi Compute Module 4, Dual Gigabit Ethernet NICs, 4GB RAM/32GB eMMC,
Support OpenWRT
i am trying to setup wifi and use openvpn and share out the eathernet port to have a hard wire computer
so when i am on the computer it will go thur openvpn i am hoping some one can help me with this
Thank you