I’m not sure if working on multiple projects is conducive to success because it seems to paralyze you. When you have a plethora of writing projects on your plate, you are slow to complete anything. You lose focus. In one instance, I even observed you procrastinating by staring at the page and trying to gain clarity on what you’re writing about in the first place.
For now, until you prove to be more adept at writing, focus on one project at a time. Pride yourself on leaving few things unfinished. You have to gain proficiency of the entire writing process from start to finish—drafting, revising, editing, polishing—before you can begin to add more to your queue.