Stop being so hard on yourself..... you have a lot of containers. Here is what I would do.
- first, I see that you have shelves, the one with the light and the other one... you can organize your material in those, so you can see them.
- Those baskets that you have by the window (the round ones) I would put my thread in those
- Just start with your material first so you can see what you have. Tell yourself that you will work on that for one week in the room doing only that. This way, you can just focus on those two things and you will feel like you are getting something done.
- The next week, if you have run out of shelve space, start with the containers and store the rest in the bends and the other stuff in the shelves, try storing them in a plastic container. Let the bottom of your large shelve, put your books on the bottom shelve. What do you think about that?