we've all been there man, no sweat, if you want to get to the top of the ladder you gotta start on the first rung. Like the above posts state, acoustic and electric are interchangeable and the only basic difference between the unplugged electric and the acoustic is size of the body, natural loudness, gauge and the height of the strings above the fretboard and that is generally it, all the same standard tuning etc, etc, so it all becomes preference. Though you can play both the same, you actually even have an advantage over the beginner electric player since then gauge (thickness, just in case) and action (height of strings above the fretboard) is higher you will develop your fine finger muscles more quickly.

the key is to press the string until the note rings as clearly as it rings open, though this might not happen on all frets because of damage etc. so strum open, then finger the first fret lightly and strum, youll probably hear a buzz since your pressing lightly, this is bad, just keep applying pressure till she rings true, this might seem alot at first, especially since its an acoustic, but so long as your applying just enough and not so much your hand cramps or other problems, eventually it will feel natural when you get your muscles up.

Just be aware that you are picking up an instrument that can do many versatile things and there is alot of stuff out there to learn, which can be overwhelming, but the important thing is to mix practice with fun so you will always remember why your playing, so grab songs you would like to play and learn as much as you can when you can, here is a quick link to my first riff I ever learned, it took me 2 weeks to just get down riffs 1 and 2, so take all the time you need, http://www.ultimate-guitar.com/tabs/c/cream/sunshine_of_your_love_tab.htm

whew... It can be tough at first but ask any established musician, jamming with your friends or playing the song youve been working on seemingly forever in front of your loved ones can be one of the most rewarding experiences of your life.

all best in your future endeavors