It sounds like you are also a beginner with Keil - yes? In that case, it would make more sense to start by getting familiar with the Keil tools - before moving on to more advanced projects like RTOS stuff...? The manuals you need to start with are:
A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.