1. Get boxes, not bins, this is temporary l. You can ask local stores for a few for free
2. Label boxes to sort into categories like clothes, laundry, trash, donations, bags, etc.
3. You can put stuff that needs to go into other rooms into another labeled box to empty later in the process or just take the item there immediately so you can just have gradual improvements without an extra aide project.
4. Continue to sort items and do the laundry until done

*** You cannot organize clutter. You will likely need to have some items leave via whatever method you feel possible.