Tool Shed question and few details

Hello, I really do not understand how the tool shed tile works. How do you move to the shed if you cannot enter it? Do monsters attack from the two adjacent zones outside the cabin? Or do monsters have to move from the adjacent tile to the so called front doors of the shed?

Does macho drink heals over the initial health? The medkit states it does not.

Victims skills. Does Tom always have one succes even if he doesn't roll any die? Does Britney cancel one succes for any action against her - attack and scare?

Thanks, The game is fun btw.