Are you trying to use https://www.familysearch.org/en/
Just to add to what LegacyUser suggested and so we are able to help you.
If you are trying to search for a name on FamilySearch.org as listed previously the help center may help you.
So please go to the link for https://www.familysearch.org/en/ and register for an account, if you have not already.
Once signed in, If you look to the top right of FamilySearch screen, you will see a small question mark in a circle. Click there and this will take you to a drop down menu.
At the bottom left of this menu, you will see the words Help center click there and then select the option that best suits you. Whether it is searching Historical records or other options.
Once you click on the option you want there will be articles in these categories that will give you instructions.
Or alternatively please respond below in the comment field
Hope this helps you