The difficult part of tidying is often deciding which version of life you are keeping ready for.

Clutter is frequently a set of unresolved futures. The clothes for a size you might return to and the papers for a career you half expect to resume are each holding a door open, and sorting them means saying out loud which doors you are actually walking through. That is why a cupboard can leave you tired in a way that has nothing to do with lifting.

Go gently, and take one category at a time. Ask what life the item belongs to and whether that is the life you are living now. You are allowed to keep some things because you are not ready yet.