I'd say the best thing to do is listen, watch, and ask lots of questions. Usually in L&D they don't give you much free-reign, so be prepared to do a lot of just shadowing. YOu might get a little more freedom with postpartum patients. Also, I'd ask the nurse you are with to show you any procedure before you attempt it yourself. It is very different often on a real person and laboring women/new moms don't like to be a guinea pig and especially don't like their babies to be one. Good luck! L&D is an awesome place.