When I have joined Lingq I have received a serie of mail explaining how to use it.
One of them point to:
www dot lingq dot com slash en slash academy
( If I put the real address it is interpreted not correctly )
You can find it in your own langague if you replace en by code for your country.
You have also an help section in the same drop down list with notifications/configuration/profile/contact us/help/disconnection.
Here is the french one: