Idk if I'd signup for a full-blown course ... week or break some tests up and practice the sections separately ... helps and don't give up! Take a few days off ...
You might be able to find some RC questions around the web, but they are the property of LSAC so you will more than likely have to purchase them. If you signup with 7sage (full course) you get access to many different PTs each having unique RC sections.
... students, and more people might signup as a result. (As a ... 7sage, I was hesistant to signup, only because I already had ... . I'm glad I signed up anyhoo.)