Start with exploring the new OS. I would recommend clicking on all the menus and then sum of the apps to see what they do. since this is your first time I would recommend that you learn the basics of the linux commands, like ls, cd, pwd, stuff like that. Then try them in the terminal. I haven't used suse my self but that is what i always to with a new os. Just look around and get your self accustomed to the layout of the desktop is the best suggestion.
Here is a link to the Documentation site for suse: http://en.opensuse.org/Documentation
It looks like there is a lot of good information on it.