Networking?
Mini vMac does not currently support networking. A real Mac Plus can use TCP/IP over a modem. All that software will work in Mini vMac, but there is no modem emulation. Mini vMac emulates the serial ports with nothing attached. In the future, I’m thinking there could be a replacement of the Mac Plus TCP/IP software to run inside Mini vMac, that could use the Mini vMac extension mechanism to talk to the TCP/IP API of the host operating system. But that is likely quite some way away. Meanwhile, you could try Basilisk II.