There’s a difference between decluttering and organising.
Decluttering is removing things permanently from your home, organising is grouping like with like and storing it somewhere (and “stashing” is a whole other beast entirely!).
If you’re living in chaos, your first step is to declutter. Don’t try to skip over it to organising (I know you would love to have it all looking beautiful in lovely matching storage but hold out a bit) because unless you declutter, it won’t last.