Keep it as simple and easy to understand as possible. Don't overload them with the total picture. Tell them to stick to the basics and not try to read all the information contained on their SFI website. Many try and are soon lost or overwhelmed by the information found there.
I tell my team to do the 'To Do List' and the Lauchpad. They can also gain much with SFI basics, but should go no further in the first few days.