Release v0.8.2 doc fixes (#2155)

* Minor basic guide fix

* made it clear for training instruction

docs/Basic-Guide.md

    `UnitySDK/Assets/ML-Agents/Examples/3DBall/TFModels/`.
 2. Open the Unity Editor, and select the **3DBall** scene as described above.
 3. Select the  **3DBallLearning** Learning Brain from the Scene hierarchy.
-5. Drag the `<brain_name>.nn` file from the Project window of
+4. Drag the `<brain_name>.nn` file from the Project window of
-6. Select Ball3DAcademy in the scene and toggle off Control, each platform's brain now regains control.
-7. Press the :arrow_forward: button at the top of the Editor.
+5. Select Ball3DAcademy in the scene and toggle off Control, each platform's brain now regains control.
+6. Press the :arrow_forward: button at the top of the Editor.
 
 ## Next Steps
 

docs/Learning-Environment-Create-New.md

 
 ## Training the Environment
 
-Now you can train the Agent. To get ready for training, you must first to change
-the `Brain` of the agent to be the Learning Brain `RollerBallBrain`.
+Now you can train the Agent. To get ready for training, you must first drag the 
+`RollerBallBrain` asset to the **RollerAgent** GameObject `Brain` field to change to the learning brain.
 Then, select the Academy GameObject and check the `Control` checkbox for 
 the RollerBallBrain item in the **Broadcast Hub** list. From there, the process is
 the same as described in [Training ML-Agents](Training-ML-Agents.md). Note that the