Hi Arshia,
Perhaps you can go to this link:
https://sites.google.com/site/offensevalsharedtask/home
To get the trial data, follow the link provided in the above page (previous year data: OLID)
To register and get the new training data (shared in google drive), please fill the Registration Form in that page.
And to participate in the shared task, go to Codalab, and register again.
Hope this can help.