It's a totally different swing, body placement, wrist action, etc. You will need to get some instruction and then practice it if you want it to yield any results. There are some good youtube videos.
But DO IT!!! It will be the best change you make to your game. The continental grip on the serve is the doorway to hitting consistently, with different spins, and developing a second serve. Consider it an investment that will pay off over a life time (given that we're talking about tennis).
Volley with that continental grip too.