My objective is to connect to the internet with two “isolated” subnets: my existing home network 192.168.0.xx and my vpn network 192.168.199.zz.
So far no success after following standard procedure. I have a feeling I have to “prepare” the ethernet-side of the MT router to “accept the VPN router. (I only have reader access to winbox)
BTW, the two routers connect wirelessly.

Any good procedures?