diff --git a/instructions_custom_topics.md b/instructions_custom_topics.md
index 4a64dd6..e041c60 100644
--- a/instructions_custom_topics.md
+++ b/instructions_custom_topics.md
@@ -125,14 +125,14 @@ publishing #1: pubsub_msg.msg.CustomMsg2(pitch_ctrl=33.33, yaw_ctrl=0.5)..._
 ## Python Package (eg. /pubsub)
 This package contains your scripts, programs and libraries. After building the workspace (`colcon build`) the custom messages are available to all other packages.  
 
-This package can be created as a CMake (C++) package or as a python package depending on your coding preference.
-* C++:    `ros2 pkg create --build-type ament-cmake <package_name>`
-* Python: `ros2 pkg create --build-type ament-python <package_name>`  
+This package can be created as a CMake (C++) package or as a python package depending on your coding preference, e.g.
+* C++:    `ros2 pkg create --build-type ament_cmake <package_name>`
+* Python: `ros2 pkg create --build-type ament_python <package_name>`  
 
 
 <package_name> directory:
 * This directory contains your python scripts (eg. listener.py)
-* Also place the non-standard libraries in this directory and import the library in your python scripts
+* Also place non-standard libraries in this directory and import them in your python scripts
 
 
 ### 1. Create Python Package