I've made the figure just like I want it. Now I want to save it so that when I choose a new pose I get my figure instead of the default. How do I do that?

This requires more specific information. If you are referring to making a pose.....pose it and then save it by clicking the "+" button at the bottom of the pose library window. Apply that pose to your appropriate figure If you are referring to the pose state that the model is in when you first load it (and each time thereafter)......load the figure, apply your pose, and then save (+) the figure (.cr2) in the character library under a different name (otherwise it will prompt you to overwrite the existing file). When you reload that figure, it will be posed as it was saved.

before adding a character to the library make sure the figure is selected,then go to the menu at the top and click on Edit>>memorize>>figure,this will "remember" what the character looks like,then add it to the figures library as a new character

That helped a lot! Thanks.