I would guess that your storyform still needs some adoptions to the story you really want to tell. It’s always a surprise when I open the PSR the first time once I have completed a storyform. Usually when I get stuck working the details out it’s because my storyform needs still some changes.
You could start writing and see where it takes you. You will learn new thinks about your story which will help you to get closer to the storyform of your story. But I would not expect that your current storyform will be the last one. I personally don’t start writing the actually story but use whatever storyform I have to start writing synopsis after synopsis.
How to keep the Throughlines seperate and make them also distinctive is for me also often the trickiest part. I posted my approach here: