If you see a task that you’d like to work on, then you must first claim it! You can do this by following the steps in this tutorial: How to find and claim tasks 
Once you’ve claimed a task, you’ll be able to access the link to work on the task in Memsource!
We also have a 30-minute training webinar on How to use Memsource which is very useful when getting started 
I’d also encourage you to check out our Translator’s Toolkit, which has lots of great resources to help you out 
