Update early-career-data-scientist.md

docs/pathways/early-career-data-scientist.md

@@ -14,9 +14,19 @@
 1. [IBM OpenDS4All What is Data Science? with Yucen Wang - Part I](https://www.youtube.com/watch?v=BLgjJvPAaqc&list=PLNs9ZO9jGtUBLCoyYNmRqz8FM3aUdJ6xD)
 2. [IBM OpenDS4All What is Data Science? with Yucen Wang - Part II](https://www.youtube.com/watch?v=OderbEVWDDU&list=PLNs9ZO9jGtUBLCoyYNmRqz8FM3aUdJ6xD&index=3)
 
-## 3. Learn command line
+## 3. Learn GitHub
 
+**Tutorials**
+1. [GitHub fundamentals](https://oboacademy.github.io/obook/tutorial/github-fundamentals/)
+2. [GitHub issues](https://oboacademy.github.io/obook/tutorial/github-issues/)
 
+**Exercises**
+1. Make edits to this OBO Academy documentation and make a pull request. (For example, find typos to fix, add or revise content to this document, etc.)
+2. Create a GitHub website: https://github.com/laderast/academic_site_workshop
+
+## 4. Learn command line
+
+**Tutorials**
 1. [Codecademy Learn the Command Line](https://www.codecademy.com/learn/learn-the-command-line)
 2. [Course: The Shell](https://missing.csail.mit.edu/2020/course-shell/)
 3. [Course: Shell Tools and Scripting](https://missing.csail.mit.edu/2020/shell-tools/)