Can somebody tell me where I can find a list of offered families search webinars?.
This is the list found in the Help Center. Help Center (familysearch.org)
You might want to try this link. It lists all the classes by month, upcoming by topic, and past webinars. If you scroll to the bottom for past webinars, which can be viewed at any time, you'll get a list that can be sorted by country, language, topic, etc. https://www.familysearch.org/en/wiki/Family_History_Library_Classes_and_Webinars
I found this from the FamilySearch.org site: Search, Research Wiki, in the search field type in "Family History Library Classes and Webinars." I usually print a few copies of the current month and next month schedules for patrons to take.