Just rtft and I think @NearlyAHoarder is doing brilliantly. I'm happy to throw away/recycle/ donate to charity without qualms, but DH and DD are both hoarders. About five years ago we had a big purge and sent nine big boxes of stuff to charity. Mostly books, DVDs and old computer games that we were just not using!
I see OP is using Konmari which is great. I used to chuck out stuff willi-nilly until Marie Kondo introduced me to the idea of, "Do you love it?" On that basis, a lot of too-small dated clothes were sent away. DH had clothes from the early 90s! and never wore them,and it took a LOT of persuading him to let them go.
If he can't let something go I put it in the garage then we purge the garage once a year.
I am now trying to organise my teenager. I've bought drawer organisers, boxes, got labels yada yada and she's started well but like OP's DD is a terrible procrastinator and would rather be reading a book instead.
I'm an unsentimental sort. I don't get emotionally invested in physical objects. But my family do, and sometimes letting things go is hard. There's a memory, or an association to a particular item and they think if they throw it away, the memory is also thrown away. DH grew up in poverty, so having "stuff" is important because "you never know when it might come in useful". His father repurposes and reuses loads of things but we live in a tiny flat whereas his dad had a three bed house and garden (and plenty of storage).
At the moment I'm sorting through some old photos and deciding which to display and which to put in a box and put away. We have lots of prints and paintings and there's been lively debate about what to keep or throw. We also have a lot of paint can with about a centimetre of paint inside each that DH refuses to get rid of (just in case) but I may have to get rid of them secretly. The project never ends.