It's always a bit of a learning curve when you're starting a new instrument, so no need to worry about difficulties or slow learning in the beginning.
In response to your question, I have to answer with my own question: What style of guitar playing are you hoping to learn (be able to play) earliest?
If you're interested in just being able to strum along to most songs you listen to, spend some time picking a couple of songs, and practice learning the chords (and their positions) off by heart. It'll take a little while, and you'll probably get frustrated because you'll have either weak fingertips, incorrect positioning of your fingers on the fretboard, or you might be 'muting' certain strings (in other words, they don't ring out because you're slightly touching them with other fingers)
Don't forget to practice your strumming hand as well! The easiest way to practice strumming patterns on the guitar is to 'Mute' all the strings at once (lightly touch all of the strings with your fretting hand, but don't actually press down on the strings), and practice strumming the strings.
Go to www.ultimate-guitar.com and just search for your favourite songs and pick maybe 3-4 to learn for the next little while.
However, if you're interested in learning to pluck the strings, starting off with simple nursery rhyme-type songs (or super simple guitar riffs) that only involve a few strings. I remember the very first song I learnt was 'Mary Had A Little Lamb,' then 'Twinkle Twinkle Little Star,' then 'Smoke on The Water'.
If you know how to read guitar tablature, again, Ultimate Guitar is your friend. Otherwise, the sheet music is easily available on the net as well.
The number one thing you should be prepared about with beginning guitar is you will get frustrated a lot!
The key is to keep playing every day for at least 20-30 mins and you'll learn fast.
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