After you cull as per the instructions here, simply do one load of laundry per day. It will always be a small load and be non intimidating to put away. Even with just DH and me, I always have enough for one small load. If I don't have enough clothes, I include the kitchen towels or whatever. Or I will do rags and the dog bed. Or bath rugs. Whatever. I love it. My clothes are always clean and put away, and I always have clean towels for the kitchen and bathrooms. If you Google this concept you will see it is a common piece of housekeeping advice.

you received great advice, but I would break it up into small sessions instead of one whole day.
One session to do laundry and fold what is clean
Another session to decide what to keep and what to get rid of
A third session to re-organize the closet with what you have decided to keep
Last, try to come up with outfits.