You can check out Cassidy's course on React here. It will teach you how to "build a reusable and declarative React component library. It's perfect for developers who are looking to build a scalable design system for their team and product." If you're not in the mood to subscribe, Cassidy would recommend Free Code Camp.
There's lots of info about Cassidy's various projects at cassidoo.co. You can catch her coding live at twitter.com/cassidoo, Thursdays at 12:30 PT/2:30 Central/3:30 Eastern.
Sara made it to the ending credits of Hades, so you know she's a fan. Cassidy is excited for the latest version of Stardew Valley and has been impressed with Half Life Alyx and the Valve Index VR headset.