Only one VLAN to have VPN (ExpressVPN-OpenVPN)

Need to have my VPN on VLAN5 which in turn is bridged to SSID-VPN. Once done, if i select VPN wifi the VPN should be activated. Experts request help

Present Setup are as follows:

  1. SSID1- Normal use
  2. VLAN3- Shared to Others
  3. VLAN4- Bridged to WiFi
    All use normal ISP internet

Already setup OpenVPN using ExpressVPN, thought there are some connection issue, which we are trying to resolve.

Need this VPN to run on VLAN5 (eth0.5), appreciate help.

VPN only on one VLAN, setup in GUI. Any quick help appreciated