Hi Brad,
I just recently took the classes and got my license in WI (December 2015). I also remember being confused by the entire process.
First thing I would suggest is to determine if you can take a full week to sit on the live classes. If so, I believe this is the way to go. If you have a brokerage in mind speak with them and they will likely have classes in house or will have recommendations. And they may even offer discounts.
However, if you are like me and work a full time job (i.e. can't take a week off for classes) then you will have to do something self paced/online. Again, there are lots of options out there but I used the WRA.org site you linked to. I did the "On-Demand" option. This worked pretty well for me as it is all video based online and has all the supporting documentation available for download. The learning portal could probably be a little nicer, and the videos seem to be a little dated (although I'm sure the information is all still accurate) but overall I was satisfied.
In terms of taking the exam, you first have to complete the training (in person or through one of the websites). Then you get a certificate that proves your completion. You take the certificate (and some other information) and sign up for the exam through Pearson Vue https://home.pearsonvue.com/.
I will say that Pearson Vue has some of the worst customer service I have ever encountered. The website is difficult, their training options/practice tests are not great, and the actual testing environment was pretty unaccommodating (look them up online and you will find lots of people with complaints). Do not waste your money on any of their practice tests online...the WRA tests are better (and included in your initial cost if you do the On Demand option).
Anyway, with all that said here are my recommendations.
1. Select your brokerage first...they will be able to guide you through the training and testing.
2. If you do the self paced/online option, make sure you finish it quickly. I ended up having to go back through the first few chapters because too much time had passed from when I started until I completed that I forgot some stuff.
3. Try to interact with the Pearson Vue folks as little as possible. Just book your exam, call to confirm your spot, and then show up and take the test. Dealing with them anymore than that will cause hair loss, heartburn, and high blood pressure :-)
Good luck and feel free to reach out if you have additional questions!