Hi GravySurfKing,
Welcome to our community! 
We moved the original content to an archive course a couple of days ago. You can find a free coupon and a link in lecture “Coupon For Original Course Content (Created In Unity (2017-2019)” (currently #201).
Alternatively, since you took a longer break, it could make sense to simply restart the current project and follow the content of the new section.
If you already completed Project Boost, you could continue with the Obstacle Course project. While you probably won’t learn anything new there about Unity and C#, it’s still an interesting project with slightly different game mechanics which could inspire you. Do what you feel is best.
See also:
- Forum User Guides : How to mark a topic as solved