Please have a look at the videos in the Support FAQ section (at the bottom of the homepage).
There are videos and explanations there to explain how to use the site, the 11+ exam, how to use the online exercises/tests in COAsT etc. here:
There is also some helpful information for parents about how to get the best from this 11+ website here:
If there is anything in particular you need help with, after having a look, please do come back to us.