I'm having trouble to grasp the combat controls, in particular blocking. How does it work? I can raise arms holding spacebar, but that alone doesn't seem to block anything, and I don't know what else I could do to make it work.

I'm not used to close combat games, sorry for the extra dumb question. It may have even been asked several times before, but I couldn't come up with a good search phrase and boolean search doesn't seem to work.