Help, I can't "find" my switch

You and I must be reading the referenced instructions differently, because that's exactly what I would have recommended as the next step. The instructions temporarily place the computer on the switch's default address subnet, then place them both on the home network subnet. To the OP, if you don't know how to change the computer's IP address in windows, from administrator mode find the network connection's status window, click properties, then select tcp/ip, and properties again. On that window you can tell it to use a fixed ip address, and use 255.255.255.0 as the subnet mask. The other settings don't matter. The change won't take affect until you close both properties windows. As a previous post said, make sure you change it back to DHCP after communicating with the switch, or you won't be able to get on your home network. The sequence might be somewhat different for different windows versions.

I did a similar thing switch-wise, with a used 28 port Cisco switch. I've spent a bunch of hours "beating my head on the wall" getting it configured. In the end, the learning will be worth it the first time you have to troubleshoot a network problem.
With a subnet mask of 255.255.255.0 (the default for the switch) 192.168.0.* and 192.168.1.* are on DIFFERENT SUBNETS and you won't be able to communicate between the devices.
 
With a subnet mask of 255.255.255.0 (the default for the switch) 192.168.0.* and 192.168.1.* are on DIFFERENT SUBNETS and you won't be able to communicate between the devices.

Umm, that's what I said, I was trying to explain how to fix it by temporarily putting a pc on the same subnet as the switch, changing the switch subnet and then changing pc back to dhcp.

Regardless, op is on the right path by doing this over the comm port with a serial link since if password has been changed from default then this won't work.