Which one is the Windows key? My keyboard doesn't have a logo

If you still can't spot it, Ctrl + Esc does the same as tapping the Windows key on its own - opens the Start menu. Doesn't help for shortcuts like Win + V but it's handy on old keyboards where the key is worn blank.

bottom row on the left, between Ctrl and Alt. On a Mac keyboard that spot is the Command key and Windows treats it as the Windows key. If you've found it and it does nothing, check for a lock - lots of gaming keyboards have a Fn combo or game mode switch that disables the Windows key.