Babysitting

I am thinking about babysitting with my friend, we got these books and they are helping, we are planning on taking babysitting and first aid classes together, we won't be able to babysit for two years so we are trying to get in all the info in. Where do I start? Do I read up and do research and then do buisness cards and other stuff, or do I do the creative stuff and THEN the research? How do I memorize all of the info? HELP!