(HTTP-)Connecting Hyper-V VM to Host

to solve a webdesign issue with an old version of Internet Explorer, I downloaded a Hyper-V image from Microsoft (https://developer.microsoft.com/en-us/microsoft-edge/tools/vms/) and started this with the Hyper-V Manager.

In the Hyper-V Manager I created an "internal" network switch, and selected that switch for the VM's network connection. I set an IPv4 address (192.168.1.1) on my Host for this network, and another address (192.168.1.2) on the VM for the network.

Now, I'm stuck: I cannot ping from the Host to the VM or the other way around (each computer can ping it's own network address). What am I missing? I read some tutorials about Hyper-V networks, but can't find the point...

I had also tried the "external" switch, which allowed the VM to connect to the Internet - but again not to the Host, although the IP addresses (then automatically retrieved) are in the same subnet.

Thanks for advice and hints!