(Will try to keep the story brief; skip to the bottom for the questions.)
My partner recently got me into Factorio. She has 1,000 hours of experience, and I am new with no knowledge of the game. We did a quick playthrough of the base game where she speed-ran us through, sort of explaining the game but not too much. She is now throwing me into the deep end of Pyanodon with her, and as someone who was already lost, I am even more lost somehow. She is first-timing Pyanodon with me, but she is quickly understanding things while I am not. I want to secretly learn more without asking her too much to surprise and help her. We are developed enough to have trains and are working on stations outside our starter base. I have been doing the game-given tutorials, but it's still somewhat different from what we seem to be doing, though not too much. I am currently attempting to learn everything about trains.
Is there any general advice or guidance I could be given? Recommended tutorials? Possible blueprints? Maybe even someone showing me how to do certain things if it isn't too much? There is no advice too small if I can help and support my partner in her Factorio gaming. Please and thank you to anyone who can help.