Don’t be afraid to have someone to help you declutter and clean. I get that you think you have too much of a mess to be having someone else help but in fact, it will make it so much easier and more importantly quicker. Once you have a more organized space your writing will be more focused as you are not thinking of all the things that need to be done. Just remember to take it one step at a time. You are doing fantastic already and this should just make it easier.