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

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