I just started in L&D but have two years med surg and two years in Hospice on an acute unit. Although I hated Med-Surg the experience was invaluable to me in gaining skills and assessment techniques that will last a lifetime. A lady was recently hired to my L&D unit who was a New Grad...she lasted about a month...it was too overwhelming and she went to Med-Surg. In this critical area, I think having some clinical experience under your belt would make you more comfortable if nothing else.
One question you can ask yourself is would the benefit of working Med-Surg hinder or help your position as a L&D nurse. I can only think that learning to start IVs, put down NG tubes, become competent in basic skills, as well as manage diabetic patients among other diseases, care for post op patients, etc would only aid in giving you the skills and confidence needed to jump into L&D.
That being said...if you jump into L&D and feel overwhelmed you can always go to Med-Surg...might be worth a shot!