As someone who comes from England and hasn't traveled abroad for quite some time(decades !) this is very informative as I intend to travel in Europe soon, b.t. w. great vlogs.
It´s more scenic to take the regional tran från Munich to Lindau and there hop on this train to Zürich. With the RE-train on the non electrified line you´ll roll through pastoral landscape throuh Immental an you can ride the RE-train with the D-ticket