Hello Cassandra and thanks a lot for your questions, and for joining TWB! Yes, you passed your test and you are a Verified translator, congratulations 
All our projects are now posted on TWB Platform, our main translation environment
You can create your TWB Platform account here. It will take only a couple of minutes 
When you register, don’t forget to update your profile by adding your native language and language combinations and sign up to email notifications 
We recently merged all the word count information we have in the two platforms, and now the total word count for the work done on both platforms is shown on TWB Platform 
The TWB Workspace is used only as a repository for past information only. All of your words produced, including those translated in the Workspace, are visible on your Translator badge in TWB Platform. You can learn more about your Translator badge in this thread in TWB Community .
The two platforms are not integrated with each other. The task will appear depending on where you claimed it. For example, I see that you claimed a task for The Emergency Nutrition Network in the Workspace (you can see it here). The PM for this task is the lovely @Viktorija. Please check our FAQs for the TWB Workspace, I think the first page will help you understand where you can find the link to start translating 
I hope this clarifies the situation, and if you have further questions I will be happy to assist.