I think you'll be pleased enough with an all grape must, that you won't find EM to be necessary. Use enzymes prior to pitching, and the wine will have plenty of extraction. EM is an advanced technique with lots that can go wrong. Wineries that do it have proper equipment to prevent air exposure and control temperature, that home winemakers rarely have. Longer term, you should of course try it as an experiment. But only after you have a cellar (closet!) full of wine that you like.
Good job though jumping into wine making from grapes! From now on, no safety net.
I like the no safety net comment.