Many threads start something like this: "I have a problem in plot/character development/this scene... I must infodump first so that you can understand this problem..." And that is exactly where the problem is! Dynamics of the story is subordinate to big pile of substances. You have substance. "What there is." You have dynamics. "What happens and how." You have structures. "How different things are connected to each others. How different chains of happenings are connected to each others. How different happenings are connected to some substance or other..." If you pack your bag too full of things before you start to walk, your packing slows your pace. And if you start to wonder "how should I walk" you might get good answers. "You need practice." "Use this technic." "Get a car!" "Use escalators.” But maybe you should ask yourself: "What did I do before I stuck? How did that influence? Did I pack my bag too heavy with things that are cool but unnecessary just now?" Try putting your dynamics before your substance and see what happens. If it does not help, try something else and tell me that I am an wrong. If it does help, tell me it did help.