Well, I just finished Week 3 (I'm in Australia so we get access to the course 11 hours earlier than you Brits!
).
Not sure about getting your teeth into anything this week. I got through it faster than the previous week. Most of the additional links were to other sources of information (like how to apply for vital records in various US states) but weren't relevant to my current research. I just bookmarked the useful ones for later investigation.
Warn you now that in the quiz in Q2 while the answer is "All of the Above" you actually have to tick
every box,
including "All of the Above".
Just want to save you some frustration. I ticked every combination with increasing blood pressure until I realised what was going on.
Hopefully they will fix that one soon.
Oh, and the discussions in 3.8 ask you to discuss sources of information: "We are curious about what sources you consider most important for the geographic area(s) or time periods you work with."
...but in 3.15 it asks you to discuss what other databases you have found useful.
As you can imagine, a rather large overlap in potential discussions. If you aren't careful, you'll end up repeating yourself from 3.8 which can be frustrating. And you'll probably be reading lots of posts from both discussions that say the same thing.