Put it on a list and make a note of what you need to solve each issue and any deadlines.
It’s important to do it on an actual list, either a piece of paper or in some note app. You should not attempt to keep track of every in your head. That’s exactly what is stopping you from doing any of it.
Once it’s on your list you can take your mind off it and start solving one thing at a time. When you try to solve something on the list you might find that you can’t solve right there and then. Put that obstacle on the list as a side quest to the main task. There’s no need to concern yourself with things that you can’t do anything about. Move on to the next solvable issue.