It would be a good idea to experiment with some RC's after you are already Lucid. Just to see how they work for you, and to get yourself used to doing them in dreams.

This is especially true for the finger through hand RC. I've also discovered that you can push your finger through anything, not just your hand. You can also push your entire arm through, and follow with your body. Like through walls for instance. It's kind of fun to play with.