Problems with VMWare Fusion and Mac keyboard commands

After installing windows on my mac with vmware fusion, and installing NVDA, things are working great, except, some commands, such as the, windows m to go back to desktop, my windows keys are command keys on mac, when i press command, or windows m to go back to desktop, instead of performing that command, the window minimizes. Also, i don't know how to do insert key on windows, i mean which is the mac equivalent of it? thanks for any help