i agree with the both comment. been playing about 6 months or so (maybe a bit longer) and I have both. Acoustic IS good for finger strength! But, if have dreams of playing electric some day, I would definately so introduce both into your practicing. The acoustic is much harder (IMO), but will benefit me as I learn on the electric as well. Plus, even you plan to play electric primarily, it is always nice to have those acoustic skills to whip out when you dont have the means to play the electric. For example, when I go over to jam with a friend and learn some tricks, I always take my acoustic cause it is just much easier than lugging the equipment around for my electric.