Baby registry?!

Courtney🐧 • Mommy of one perfect little girl 💜
When would be the best time to start a registry?
Everyone keeps asking what I "want" for baby and I'm basically clueless and reply like uhhhhhhh..... nothing? Wait til the baby shower?! I guess it's because I feel so bad asking or really recommending anything for some reason, but at the same time I want to buy her stuff myself as well..  
So everyone's demanding a registry! 
Does anyone have advice with making one? As in where to make one, what to include for first baby, anything!?!?!
Thank you in advance!!!