hi debbo,
you might want to start by looking here:
http://forum.enjoysudoku.com/viewtopic.php?p=21804#p21804to learn some of the solving techniques that are talked about.
Also if you have questions about particular puzzles you're stuck on post your question here:
http://forum.enjoysudoku.com/viewforum.php?f=17and someone will probably help you out.
it's not such a good idea as a newbie on a forum to wade into a deep thread about advanced techniques and ask a trivial question, but I think most people here are forgiving sorts
welcome to the forum and have fun