7:35 The refineries don't produce oil, they produce fuel which goes straight into your stockpile of fuel. One refinery doesn't produce much though and it is often better to just trade for oil if you can.
Yeah, it sucks that refineries aren't very good at making fuel at all. The rubber part is what actually makes them useful. But it means countries with lacking fuel reserves get seriously hindered by having to import so much oil.
You being unprepared for poland is your fault tbh. In my game i had an army on lithuanias border even though i didn't even know if anyone would backstab me. You knew poland would go syndicalist and did nothing to prepare.