should i learn orocos fully for rtt_ros_integration?

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If i want to create ros nodes which implements rtt_ros_integration packages, so that to control the robot in hard real time. Do i need to lean all the orocos concepts properly? Becaue currentely i was learning orocos from its tutorial sites but i'm finding it littele difficult to grab all the aspects of orocos in practice. i.e lot of error comming and hard to find good tutorial. Also in their forum new users can't sign in/ register don't knw why as a result i can't ask questions theri.