Got to say that you did the right thing in buying a acoustic guitar before an electric one. First it will help you gain strenght in your finger and also it's a lot harder to make a acoustic guitar sound good than an electric. It may be frustrating at first but in the long run you'll benefit greatly from it.

The first thing I should have done when I started was to learn chords and concentrate on rythmn instead of lead guitar. Chords will help you with finger positioning. I always found great songs to learn chords in traditionnal music. I know, they ain't the most fun to play but it's going to help you.

I've been playing for 9 years now and I still have trouble with basic stuff cause I never took the time to learn them correctly. I was to busy showing off ;)

When you feel good about playing some basic chords, pick a tab of a acoustic song you like on the net and start practicing the rythmn part. The key of success is motivation. At first it may be boring, playing chords and playing chords and playing chords. But once you get the basics out of the way, start playing songs you like and you'll never stop.

This site is so full of tools you can use, take a look around and you'll get all the answer you need.