Maybe wrong group but I need help!!

Please look at these pictures of my closet and tell me what I can do to fix it!! It’s a total mess. There’s so much space there but I have it all filled up somehow! It’s especially issue with all the tons of sheets we have in there, and also now I have the “guest” towels in there since the guest bathroom has no storage basically and has all the baby stuff in there now. What would you do!?!? I also don’t desperately need that bookcase in there, we don’t read that much right now.