There are at least 4 different positions you can hold your tennis racket. Continental is where it all starts.
Attached is a picture of a tennis racket and all the information about it.
This video will help with doing a forehand slice.
This video will help you with a backhand slice.
If your new to tennis, watch this video to give you a better understanding about the game.
Watch this video to help you with your serve.
The big question, when to restring my racket? Watch this video to help answer that question.