Soooo much information, please help

I already have a BA in Communications, Mass Media. I am now a stay at home mom and am seriously considering going back to school to obtain a BSN. Can anyone provide me with some direction...there is so much info. on the internet! Do I have to go back to school for 4 years? My children are 4 and 2, is it even realistic to think I could endure such a challenging program right now? Any advice would be greatly appreciated...thanks!