For specific things, you'll have to look at the guides, but the 'Help' tab on the menu will give you some general tips and the 'Relationships' tab will walk you through the relationships in game.
Okay, after looking through some of the guides, I can see there's a lot of useful information in them, so thanks for writing them out. I do think, however, it would be nice to have one place to look to rather than having to scroll through all the posts.