Welcome @Juels! It's a lot to catch up on, but here's the short version clue-wise.
We're trying to figure out the current assessment which came after fragments 9-12. No need to solve everything up to then.
The current assessment is being worked on in this thread.
The 'summarize this topic' button is a great help in catching up to big threads.
If you want to catch up story wise the weekly updates that can be found in the header of the main site are a great recap of what's going on each week.
Hollar if you have any other questions!