User blog comment:SomeoneYouUsedToKnow/SYUTK's V5E4 - OHANA - Impressions/Recap/@comment-26018514-20171109010240/@comment-26397825-20171109232505

Ruby started learning to use a scythe before Qrow took her under his wing; she said “I was complete garbage before he took me under his wing”. He didn’t teach her from scratch, he taught her once he saw how terrible she was at her chosen fighting style, which happened to align with his chosen fighting style.

And she said that she made and designed crescent Rose herself when she was talking to Jaune about it in the very first season.