Paper clutter didn't happen overnight, so we usually can't get rid of it instantly either. Be patient and kind to yourself. You are making a huge number of decisions. Try to work on paper clutter in your peak time of day. Try to limit yourself to no more than an hour or two at a time.
Try Unclutterer's Five uncluttering things you can do in your office right now and consider subscribing to her blog. Also, https://freedomfiler.com/LearningArticles.cfm is a good summary article for filing.
Since we are all unique people with our own organizing styles and preferences, check out How to Be Organized in Spite of Yourself: Time and Space Management That Works With Your Personal Style by Sunny Schlenger and Roberta Roesch. When you figure out what “type” you are in this book, then that is the only section you need to read. The types of suggestions are tailored to the organizing preferences of the type.
You can do this!
Breast cancer survivor and clutter clearing author learns to walk her talk
Clutter clearing cancer coping author and motivational speaker We can learn to live our priorities fully (and not just surviving or getting by on a day to day basis) by clearing out the distractions and focusing on what is important to each of us, our families, and our lives. Cancer Survivorship Coping Tools: We'll get you through this by Barbara Tako, two-time cancer survivor and published author and motivational speaker on the topic of clutter clearing. For updates on this new book, click here.