hAP ac2 as VPN router with advanced routing

RouterOS Beginner Basics
1

Hello.

Could you please explain me how to implement the scenario below? I would be really appreciated this.

  1. hAP ac^2 accepts connections only over wireless network @2GHz. All clients are in 192.168.88.0/24 subnet.
  2. ISP router accepts connections over wireless network @5GHz. All clients are in 192.168.8.0/24 subnet.
  3. hAP ac^2 connects to ISP router over wireless network @5GHz for uplink.
  4. hAP ac^2 establishes VPN client connection using PPTP / L2TP / OpenVPN to “1.2.3.4”.
  5. hAP ac^2 is tunneling traffic from wireless clients to ISP router and reach VPN server somewhere outside in the Internet.
  6. hAP ac^2 wireless clients bypass VPN tunnel for 192.168.8.0/24 and connects to IPs.

Any help welcomed.
Thank you.