Lots of good advice here... use plastic bins but FIRST...separate your fabrics by color.... maybe there are some that don't appeal to you anymore (sale on this site).. seems like lots of drooling going on here... ha ha
If it seems too overwhelming... just do one area at a time. When you have separated your gorgeous fabrics.. begin to load them in the plastic bins.. You can see through them so it should not be difficult to find anything once everything is stored. Good luck... take your time. When frustration sets in... stop... go back when you feel better.. good luck.