Hello,
You can start by taking a look to the latest version of the manual (v7p2).
My suggestion, if you're new on Telemac, is to start step-by-step: fist hydrodynamics (telemac-2d), then Sisyphe (without waves) and then with waves.
Take a look to the examples, play around them and modify some parameters.
I hope it helps,
Pablo
PS: A the Telemac's family is an wide, open community please try to post your messages in English.