Can I migrate files to Mac from PC using iCloud?

We have just got an iMac and I have been trying to migrate files etc. from our old PC using Migration Assistant, but to no avail. PC says Mac is trying to connect, Mac says it has found PC but that is as far as I can get! Has anyone any suggestion? I am not at all used to Mac, having had PCs for the last 18 years, but I use iPad and iPhone as does my husband, and so we wanted to treat ourselves, expecting we would be able to link up easily with these items. I'm sure it will be, if I ever manage to get our files transferred! Our son suggested it might be possible to use iCloud but I have seen nothing to suggest that - would it be possible?

Please can anyone advise?