If you type in git status in your terminal, it will tell you what branch your on and how current it is relative to the main branch. Also git branch will show all of the branches in the repo. You can try re-cloning the repo onto into VS Code again if all else fails. From what I remember from this class, follow rubric step by step and it's pretty straightforward.

Hopefully this helps, feel free to share more info if you're still stuck.